You will observe
that I propose no crusade for abolition, or, according to your language, no
change of programme, making it a war of abolition instead of a war for the
preservation of the Union. I accept the latter formula, but insist that the
Union can be preserved only by striking at slavery. In short, abolition is not
to be the object of the war, but simply one of its agencies. Mr. Cameron's
instructions are practically a proclamation of freedom to the slaves where the
expedition lands; and not only this, an invitation to take part “in squads and
companies.” And this is beyond the Act of Congress and only by virtue of
martial law. Indeed, he goes beyond Fremont.
SOURCE: Edward L.
Pierce, Memoir and Letters of Charles Sumner: Volume 4, p. 49