From W. S. Dallas 20 November 1867
Yorkshire Philosophical Society | York
20 Nov. 1867
My dear Sir
Except in the two or three earlier chapters of your book I have adopted your plan of giving every author’s name,—the others I must fill in before completion.—1 It makes the labour very great, however, & I cannot get on so quickly as I could wish.—2
Instead of 6 sheets per noctem 3 upon which I calculated, I can only get through 3 or at most 4— Still I hope to finish Vol. I. tomorrow night, & I have now up to page 192 of Vol. 2 in rough impressions.— I shall press on as fast as I can, but the work cannot be done quickly & well, as its very nature requires that much consideration should be given to almost every paragraph.—
Believe me | Your’s very truly | W. S. Dallas.
The proofs can be managed in any way most convenient to you.—
Chas. Darwin Esq.
Has adopted CD’s plan of giving every author’s name in index [of Variation], but it causes delay.