Sent from Sir Francis Galton
Feb 1900
Description:

‘Dear Prof. K. Pearson,

Thank you heartily for letting me see, as a New Years gift, the important proof sheets. By much hammering, the bad part of the “law” will be knocked out of it and the good, if any, will remain. Ypu know probably that indian ink (1) in water & common ink (2) may look alike, but if you pass the former through a filter of blotting paper the water the water alone comes through; not so with regard to ink. Now a mixture of (1) with water is not properly a blend, but a mixture with (2) is. When the particles in any case of “particulate” inheritance are small and independent, I do not see any sensible difference (within reasonable limits) between the behaviour of the two. But now comes the consideration which I take to be the great problem, and that which I conceive lies at the bottom of stability of type viz: regarding the imperfectly explored facts of group-correlation. Let, in a given “stirp” a, b, c,... be classes of elements which develop in that order, the several classes consisting of a1, a2... b1, b2... , &c varieties. ...

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We have had a very interesting & healthful journey to Wady [sic] Halfa & back including a weeks’ stay with Flinders Petrie, at his digging....’