You will find it difficult (page 14 of your letter) to make a marked line of separation between fertile and infertile crosses.
I do not see how the apparently sudden change (for the suddenness of change in a chrysalis is of course largely only apparent) in larvae during their development throws any light on the subject.
I wish I could have made this letter better worth sending to you.

I have had it copied to save you at least the intolerable trouble of reading my bad handwriting.

Again I thank you for your great liberality and kindness in sending me your criticisms, and I heartily wish we were a little nearer in accord; but we must remain content to be as wide asunder as the poles, but without, thank God, any malice or other ill-feeling.
LETTER 111.

TO T.H.

HUXLEY.
(111/1.