REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and Board of Trustees of
Boston Trust Walden Funds

In planning and performing our audit of the financial
statements of Boston Trust Walden Funds comprising Boston
Trust Asset Management Fund, Boston Trust Equity Fund,
Boston Trust Midcap Fund, Boston Trust SMID Cap Fund,
Boston Trust Walden Balanced Fund, Boston Trust Walden
Equity Fund, Boston Trust Walden Midcap Fund, Boston
Trust Walden SMID Cap Fund, Boston Trust Walden Small Cap
Fund, and Boston Trust Walden International Equity Fund
(the "Funds") as of and for the year ended December 31,
2022, in accordance with the standards of the Public
Company Accounting Oversight Board (United States)
(PCAOB), we considered the Funds' internal control over
financial reporting, including controls over safeguarding
securities, as a basis for designing our auditing
procedures for the purpose of expressing our opinion
on the financial statements and to comply with the
requirements of Form N-CEN, but not for the purpose of
expressing an opinion on the effectiveness of the Funds'
internal control over financial reporting. Accordingly,
we express no such opinion.

The management of the Funds' is responsible for
establishing and maintaining effective internal control
over financial reporting. In fulfilling this
responsibility, estimates and judgments by management
are required to assess the expected benefits and related
costs of controls. A fund's internal control over
financial reporting is a process designed to provide
reasonable assurance regarding the reliability of
financial reporting and the preparation of financial
statements for external purposes in accordance with
generally accepted accounting principles (GAAP). A
fund's internal control over financial reporting includes
those policies and procedures that (1) pertain to the
maintenance of records that, in reasonable detail,
accurately and fairly reflect the transactions and
dispositions of the assets of the fund; (2) provide
reasonable assurance that transactions are recorded as
necessary to permit preparation of financial statements
in accordance with GAAP, and that receipts and expenditures
of the fund are being made only in accordance with
authorizations of management and trustees of the fund;
and (3) provide reasonable assurance regarding prevention
or timely detection of unauthorized acquisition, use or
disposition of a fund's assets that could have a material
effect on the financial statements.

Because of its inherent limitations, internal control over
financial reporting may not prevent or detect misstatements.
Also, projections of any evaluation of effectiveness to
future periods are subject to the risk that controls may
become inadequate because of changes in conditions, or that
the degree of compliance with the policies or procedures may
deteriorate.

A deficiency in internal control over financial reporting
exists when the design or operation of a control does not
allow management or employees, in the normal course of
performing their assigned functions, to prevent or detect
misstatements on a timely basis. A material weakness is a
deficiency, or combination of deficiencies, in internal
control over financial reporting, such that there is a
reasonable possibility that a material misstatement of the
Funds' annual or interim financial statements will not be
prevented or detected on a timely basis.

Our consideration of the Funds' internal control over
financial reporting was for the limited purpose described
in the first paragraph and would not necessarily disclose
all deficiencies in internal control that might be material
weaknesses under standards established by the PCAOB.
However, we noted no deficiencies in the Funds' internal
control over financial reporting and its operation,
including controls over safeguarding securities, that we
consider to be a material weakness as defined above as of
December 31, 2022.

This report is intended solely for the information and use
of management and the Board of Trustees of the Funds and
the Securities and Exchange Commission and is not intended
to be and should not be used by anyone other than these
specified parties.

COHEN & COMPANY, LTD.
Milwaukee, Wisconsin
March 1, 2023