REPORT OF INDEPENDENT REGISTERED PUBLIC
ACCOUNTING FIRM

To the Trustees of Eaton Vance Special Investment Trust and
Shareholders of Eaton Vance 1 -to- 10 Year Laddered Corporate
Bond Fund:

In planning and performing our audit of the financial statements
of Eaton Vance 1 -to- 10 Year Laddered Corporate Bond Fund
(the "Fund") (one of the funds constituting Eaton Vance Special
Investment Trust) as of and for the year ended August 31, 2019,
in accordance with the standards of the Public Company
Accounting Oversight Board (United States) (PCAOB), we
considered the Fund'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 Fund's internal
control over financial reporting. Accordingly, we express no such
opinion.

The management of the Fund 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. 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 generally
accepted accounting principles, and that receipts and
expenditures of the fund are being made only in accordance with
authorizations of management of the fund and trustees of the
trust; 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 a
combination of deficiencies, in internal control over financial
reporting, such that there is a reasonable possibility that a
material misstatement of the fund's annual or interim financial
statements will not be prevented or detected on a timely basis.

Our consideration of the Fund'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 Fund'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 August 31, 2019.

This report is intended solely for the information and use of
management of the Fund and the Trustees of Eaton Vance
Special Investment 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
October 18, 2019