Sends seeds of Lathyrus and suggests an advantage of climbing plants is to shed their seeds in places secure from animals.

Contrary to F. Delpino, in JTM’s experience Ophrys aranifera is not sterile. However, seed germination is poor.

In a densely overgrown plot Convolvulus sabatius, not normally a twiner, becomes one.

Continues his extensive study on variability in Arbutus, and speculates on selection in fruit shape.

JH and R. I. Murchison have agreed to be trustees [of Sinai survey; see PB's 1869-12-9]. Subscriptions to support survey. Sends description of expedition. Royal Geological Society unanimously approved survey.