From W. E. Darwin   10 February [1880]1

Basset

Feb 10th

My dear Father,

We got back v. comfortably & S. is quite fresh today comparatively speaking.2 dia in composition means through, across, as diabainō to go across— diaballō to throw across.3

I send the small Greek dictionary by rail.

My love to mother— I hope she is better.

Your affect Son | W. E. Darwin

The next time you have the Huxleys give us a chance of meeting them—4 S. is very anxious to meet him

The year is established by the reference to returning home (see n. 2, below).
William and Sara Darwin had visited Down from 7 to 9 February 1880 (Emma Darwin’s diary (DAR 242)).
Diabainō: transliteration of Greek διαβαίνω (cross, pass through); diaballō: transliteration of Greek διαβάλλω (throw across). CD used the term ‘diaheliotropism’ to refer to a movement more or less transverse to the light and induced by it (Movement in plants, p. 5). The term was probably chosen by CD to replace the German term ‘Transversal-Heliotropismus’, which had been introduced by Albert Bernhard Frank (see Frank 1870, p. 77).

Please cite as “DCP-LETT-11352,” in Ɛpsilon: The Charles Darwin Collection accessed on 5 June 2025, https://epsilon.ac.uk/view/dcp-data/letters/DCP-LETT-11352