Exhibit (a)(7)


This  announcement  is not an offer to purchase or a solicitation of an offer to
sell shares (as defined  below).  The Offer (as defined below) is made solely by
the  Offer to  Purchase  dated  January  22,  2007  and the  related  letter  of
transmittal  and any amendments or  supplements  hereto and is being made to all
holders of shares.  The Offer is not being made to, nor will tenders be accepted
from or on behalf of, holders of shares in any  jurisdiction in which the making
of the Offer or the  acceptance  thereof  would not comply with the laws of that
jurisdiction.  In any jurisdiction where the securities,  blue sky or other laws
require the Offer to be made by a licensed broker or dealer,  the Offer shall be
deemed  to be made on behalf  of the  Trust  (as  defined  below) by one or more
registered  brokers  or  dealers  which  are  licensed  under  the  laws of such
jurisdiction.

                      Notice of Offer to Purchase for Cash
                     All Outstanding Shares of Common Stock
                                       of
               Putnam California Investment Grade Municipal Trust
                                       at
                              $14.16 Net Per Share
                                       by
                            Mildred B. Horejsi Trust

     The Mildred B. Horejsi Trust, an irrevocable  grantor trust administered in
accordance with Alaska administrative  statutes and governed by Alaska trust law
(the "Trust" and also referred to herein as "we," "our" or "us"), is offering to
purchase all of the issued and  outstanding  shares of common  stock,  par value
$0.001 per share (the "shares"), of Putnam California Investment Grade Municipal
Trust, a Massachusetts  business trust ("PCA"),  at a price of $14.16 per share,
net to the seller in cash  (subject to applicable  withholding  of United States
federal,  state and local taxes), without interest (the "Offer Price"), upon the
terms and subject to the  conditions  set forth in the Offer to  Purchase  dated
January  22,  2007  (the  "Offer  to  Purchase")  and in the  related  letter of
transmittal  (which,  together  with  any  amendments  or  supplements  thereto,
constitute the "Offer").


- --------------------------------------------------------------------------------
            THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 12:00 MIDNIGHT,
                   NEW YORK CITY TIME, ON FEBRUARY 16, 2007,
                          UNLESS THE OFFER IS EXTENDED
- --------------------------------------------------------------------------------

     The purpose of the Offer is to acquire all of the  outstanding  shares,  so
that we may influence  the policies and  management of PCA to take the fund in a
new direction.  Even if we do not acquire all of the outstanding  shares,  it is
our  intent  to move PCA in a new  direction  as  discussed  in the  Offer.  For
stockholders who do not wish to be a part of the new direction,  the Offer is an
opportunity  to sell  shares  before any  changes  occur.  We  believe  that the
shareholders  of PCA  deserve a fresh  start and a new  direction,  particularly
given that the  Securities  and Exchange  Commission has gone on record to state
that  officials  of  Putnam  breached  their  fiduciary  duty  to PCA,  and,  in
Morningstar's(TM)  latest ratings  (December 31, 2006), PCA received only 2 of 5
stars for its overall,  10-,  and 5-year  performance  history,  and only 1 of 5
stars for its 3-year  performance  history,  as  compared  with other  similarly
situated  California  municipal  long-position  closed-end funds. . We currently
intend, as soon as practicable after  consummation of the Offer, to seek maximum
representation  on PCA's  board of  trustees,  to propose  the  termination  and
replacement of PCA's incumbent adviser, portfolio manager and administrator,  to
propose that PCA change its name,  and to propose that PCA change its investment
policies and objectives,  which may include, among other changes,  proposals for
PCA to expand its scope to include  investments in common  stocks,  fixed income
securities,   real  estate  operating   companies  and  investment  trusts,  and
securities  issued by companies  outside the United States,  consistent with our
philosophy that PCA's advisors should have the greatest possible  flexibility to
seek out and invest in  securities  they believe to be the best values among any
asset class anywhere in the world. We do not have any current plans or proposals
for a merger or other similar business combination involving PCA or otherwise to
effect an extraordinary  corporate transaction following the consummation of the
Offer.

     The Offer is not  conditioned  upon the receipt of financing.  The Offer is
subject to conditions, among others, that, at the expiration of the Offer, there
shall have been  validly  tendered in the Offer and not  properly  withdrawn  at
least 25% of the total number of  outstanding  shares at the time.  The Offer is
also  subject  to  certain  conditions  set forth in  Section 14 of the Offer to
Purchase.

     Subject  to the  terms  of the  applicable  rules  and  regulations  of the
Securities  and  Exchange  Commission,  we reserve  the  right,  but will not be
obligated at any time and from time to time,  and  regardless  of whether or not
the  conditions  set forth in the Section 14 of the Offer to Purchase shall have
been satisfied,  to extend the Offer beyond the then scheduled  expiration date,
and thereby  delay  acceptance  for  payment of and  payment for any shares,  by
giving oral or written notice of that extension to the depositary (which will be
followed as promptly as practicable by a public  announcement  thereof).  During
any such extension, all shares previously tendered and not withdrawn will remain
subject to the Offer,  subject to the rights of a  tendering  holder to withdraw
its shares on the terms and conditions described in the Offer to Purchase.

     For purposes of the Offer,  we will be deemed to have accepted for payment,
and thereby purchased,  shares properly tendered to us and not withdrawn, if and
when we give oral or written  notice to the  depositary  of our  acceptance  for
payment of those shares.  In all cases,  payment for shares accepted for payment
pursuant to the Offer will be made only after timely  receipt by the  depositary
of (1) the certificates for (or a timely book-entry  confirmation (as defined in
the Offer to Purchase) with respect to) such shares, (2) a letter of transmittal
(or a  facsimile  thereof),  properly  completed  and  duly  executed,  with any
required signature guarantees, or, in the case of a book-entry transfer effected
pursuant  to the  procedures  set forth in the  Offer to  Purchase,  an  agent's
message  (as  defined  in the Offer to  Purchase),  and (3) any other  documents
required  by the  letter  of  transmittal.  Under no  circumstances  will we pay
interest on the purchase price of shares, regardless of any delay in making such
payment or extension of the Offer.

     Tenders of shares made  pursuant to the Offer may be  withdrawn at any time
prior to the expiration of the Offer.  To withdraw  tendered  shares,  a written
notice of withdrawal  with respect to such shares must be timely received by the
depositary  at one of its  addresses set forth on the back cover of the Offer to
Purchase,  and the notice of withdrawal  must specify the name of the person who
tendered the shares to be  withdrawn,  the number of shares to be withdrawn  and
the name of the  registered  holder of  shares,  if  different  from that of the
person who tendered such shares. If certificates for shares to be withdrawn have
been delivered to the depositary  then,  prior to the physical  release of those
certificates,  the serial numbers shown on those  certificates must be submitted
to the depositary and,  unless an eligible  institution (as defined in the Offer
to Purchase) has tendered those shares,  an eligible  institution must guarantee
the  signatures on the notice of  withdrawal.  If shares have been  delivered in
accordance with the procedures for book-entry transfer set forth in the Offer to
Purchase, then any notice of withdrawal must also specify the name and number of
the  account at the  book-entry  transfer  facility  (as defined in the Offer to
Purchase) to be credited with the withdrawn shares and otherwise comply with the
book-entry transfer facility's procedures.

     The information  required to be disclosed by paragraph (d)(1) of Rule 14d-6
of the General Rules and Regulations  under the Securities  Exchange Act of 1934
is contained in the Offer to Purchase and the related letter of transmittal  and
is incorporated herein by reference.

     A  request  is being  made to PCA for the use of its  stockholder  list and
security position listings for the purpose of disseminating the Offer to holders
of shares.  The Offer to Purchase and the related letter of transmittal  will be
mailed to record  holders of shares and will be furnished to brokers,  banks and
similar  persons  whose  names,  or the names of whose  nominees,  appear on the
stockholder list or, if applicable, who are listed as participants in a clearing
agency's  security  position  listing for  subsequent  transmittal to beneficial
owners of shares.

     The  Offer to  Purchase  and the  related  letter  of  transmittal  contain
important  information.  Holders of shares should  carefully  read both in their
entirety before any decision is made with respect to the Offer.

     Any questions or requests for assistance may be directed to the information
agent at the telephone numbers and address set forth below.  Requests for copies
of the Offer to Purchase and the related letter of transmittal  and other tender
offer materials may be directed to the information agent as set forth below, and
copies will be  furnished  promptly at our  expense.  Holders of shares may also
contact  their broker,  dealer,  commercial  bank,  trust company or nominee for
assistance concerning the Offer. To confirm delivery of shares, stockholders are
directed to contact the depositary.

                     The Information Agent for the Offer is:

                               Morrow & Co., Inc.
                                 470 West Avenue
                               Stamford, CT 06902

                      Banks and Brokers Call (203) 658-9400
                   Shareholders Call Toll Free: (800) 607-0088

January 22, 2007