From Briton Riviere   3 April 1872

Dear Sir

I shall be very glad indeed if I can succeed in drawing the two expressions that you want.¹ I think that I understand your descriptions perfectly, whether I can carry them out is another question.

Will you kindly ask your wood engraver² to send me a couple of blocks of the size required, as if I can manage the expressions I may as well put them at once onto the wood. This will be no inconvenience to me & will I think be better for the drawings.

I quite understand your objections to Landseers “Alexander” in reference to expression No 1.³

Trusting that I shall not cause delay & then fail in my part of the work I am Dear Sir | Yours truly | Briton Riviere

The German drawing shall be taken care of⁴

Charles Darwin Esq