To Briton Riviere   4 April 1872

Dear Sir

I thank you most sincerely for your kindness. You must not think of trying until you feel some inclination and strength for the task. I have written to Mr. Cooper (188 Strand) to send you the blocks.¹

My dear Sir | yours very faithfully | Ch. Darwin

P.S. I may as well add my address for parcels viz. C. Darwin Esq. | Orpington Station | South Eastern Railway