“Professor Tyndall to F. P. C.
“Royal Institution of Great Britain,
“7th Nov., 1865.
“My dear Miss Cobbe,
“Our minds—that is yours and mine—sound the same note as regards the economy of nature. With clearness and precision you have stated the question. In fact, had I known that you had written upon the subject I might have copied your words and put my name to them.
“I intend to keep your book, but I have desired my publisher to send you a book of mine in exchange—this is fair, is it not?
“Your book so far as I have read it is full of strength. Of course I could not have written it all. Your images are too concrete and your personification of the mystery of mysteries too intense for me. But as long as you are tolerant of others—which you are—the shape into which you mould the power of your soul must be determined by yourself alone.
“Believe me, yours most truly,
“John Tyndall.”
“Royal Institution of Great Britain,