My dear Darwin

Of the three things I undertook to do for you I have as yet only done 2$\frac{1}{3}$^d.¹

1. Greg did write the article in Fraser. and has no objection at all,—but the contrary,—in being publickly spoken of as the author.² He is highly gratified at your appreciation of the article.

2. I have read Duncan’s book on Fertility, which seems to me to shew unmistakeably that marriages of young women contribute enormously more to the adult population of the next generation than those of middle aged women.³

The number of children he shews to be very much greater   He also shews the weight & length of children born to young (not very young) mothers to be a maximum & therefore the probability of their being more vigorous   As a set off against this he reproduces a table published by a C^ttee of the Statistical Society some years ago of which I can make nothing except that the irregularity of its figures shew no great dependance can be put upon it.

($\frac{1}{3}$^d) I have only seen Bartlett once out of the 3 promised times, viz: this morning and jogged his memory about the crying monkey.⁴ He answered just as you told me he would.

With united kind regards | Francis Galton

We transfused 4 rabbits this morning & I have 1 buck & 1 doe almost quite well after being operated on.⁵