My dear Sir.

I shall be glad to do the little diagram as you request.—¹ Have you read von Mohl’s “Bau und Winden der Ranken und Schlingpflanzen”?² I have not read it myself,—but he refers to it in his “Anat^y. &c. of the Vegetable Cell”.³ when he refers to the “enigmat^l” phenomena of twiners,—the internodes of which he describes as (when they have attained a certain age) beginning to curl so that the upper parts are “continually carried round in a circle like the hand of a clock,” &c. &c.

Have you—to spare—a copy of the photog. of wh. one reached D^r. Hooker a few days ago,—reminding him of Moses,⁴ &c. I sh^d. much value one.

Yours very sincerely | Da^l. Oliver.