"UNITED STATES PATENT OFFICE,
"WASHINGTON, _October 24, 1885_.
"HON. SAML. J. TILDEN.
"MY DEAR SIR,--A few moments ago I received the two letters
which you were good enough to write at my request. I am, as you may
surmise, very highly gratified with them. They contain all (and more
than all) that I had hoped for, and must certainly accomplish their
purpose. And I assure you that I am full of gratitude to you for an
interest in my affairs which gives me fresh courage, and which shows
me again the great heart that inspired these letters. I only wish
that I could thank you in adequate terms, or that I could again _do
something_ to exhibit the warm personal regard for you into which my
original esteem has developed. If the day ever comes that I can be
of service to you, command me.
"With my kindest regards and warmest wishes for your health and
happiness, I am,
"Very respectfully and truly,
"Your obedient servant,
"D. A. MCKNIGHT."