Thanks for Botanische Zeitung notice of CD’s paper ["On the character and hybrid-like nature of the offspring from the illegitimate unions of dimorphic and trimorphic plants", J. Linn. Soc. Lond. (Bot.) 10 (1869): 393–437]. FH writes clearest style of all German authors.
Asks that August Weismann be told about papers by Wallace and Bates.