"_July 22d, 1884._
"DEAR MR. DANA,--I could not but feel much gratified at the
interest in my career manifested in your note of the 18th inst.
"It will afford me pleasure to collect such materials for your
purpose as I can procure. It may be necessary to have a personal
interview to define more exactly what you desire. That will be an
occasion for an additional pleasure.
"In the mean time, with assurances of my regards and esteem, I
remain,
"Very truly yours."