My dear Sir

I am very much obliged to you for having so promptly & kindly finished your undertaking.—

The large Pectines may certainly be left undescribed.—

I am not likely to be in town for a fortnight or more & therefore, without you think you can explain any points vivâ voce better than on paper, it would perhaps be best to have all the specimens & M.S. packed up together & I will send our Carrier for them on Thursday week which is the first day that I can.— But please be so kind as to send me a line, if you think it at all adviseable that I sh^d see you on the subject & I will make a point of calling the very first time I come up.—

Will you when at leisure oblige me by informing me how many hours of your time you have been so good as to give to me.¹

It is very strange & provoking about the Turritellæ: I shall have to go through all, when I begin to calculate how far I can go in engraving the new spec.² & then possibly they may somehow turn up.

Your’s very faithfully | C. Darwin