REPORT OF INDEPENDENT REGISTERED PUBLIC
ACCOUNTING FIRM

To the Trustees and Shareholders of Eaton Vance Senior
Floating-Rate Trust:

In planning and performing our audit of the financial
statements of Eaton Vance Senior Floating-Rate Trust
(the
"Trust") as of and for the year ended October 31, 2018,
in accordance with the standards of the Public Company
Accounting Oversight Board (United States) (PCAOB),
we considered the Trust's 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 Trust's internal control over
financial reporting. Accordingly, we express no such
opinion.

The management of the Trust 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
trust'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. A trust'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 trust; (2) provide reasonable assurance that
transactions are recorded as necessary to permit
preparation of
financial statements in accordance with generally
accepted accounting principles, and that receipts and
expenditures of the trust are being made only in
accordance with authorizations of management and
trustees of
the trust; and (3) provide reasonable assurance
regarding prevention or timely detection of
unauthorized
acquisition, use, or disposition of a trust'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 a combination of
deficiencies, in
internal control over financial reporting, such that there
is a reasonable possibility that a material misstatement
of
the trust's annual or interim financial statements will
not be prevented or detected on a timely basis.

Our consideration of the Trust's 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 Trust's
internal control over financial reporting and its
operation, including controls for safeguarding
securities, that we
consider to be a material weakness, as defined above,
as of October 31, 2018.

This report is intended solely for the information and
use of management and the Trustees of Eaton Vance
Senior
Floating-Rate Trust and the Securities and Exchange
Commission and is not intended to be and should not
be
used by anyone other than these specified parties.

/s/ Deloitte & Touche LLP

Boston, Massachusetts
December 14, 2018