From J. D. Hooker   23 September 1874

Dear Darwin

I am so glad that you have cleared the way for progress with Utricularia montana, of which I shall bring one plant.¹ I had examined the tubes for you some weeks ago, but quite forgot to tell you about them— They are no doubt transformed utricles, for propagation purposes perhaps, or as you suggest perhaps as reservoirs of nourishment. Oliver has figured utricles on the rhizome of a species in the Linnean Journal.²

Your finding the bladders, & subterranean ones, & insects in them, is a grand discovery, a genuine trinity to be worshipped in unity.

I am going to do a thing that no Lady dares do, in this House at any rate—it is to ask if we may bring Harriette on Saturday.³ & I do so in full faith trust & hope that Mrs Darwin will say no without scruple, if in any way inconvenient. My wife⁴ & I have been out so much of late, leaving Harriette in solitude, that I quite pity her— she was to have gone to Gloucestershire on Saturday, but her visit there is put-off— I would have asked Mrs Darwin to take Harriette instead of her mother— but the latter won’t give up her pleasant prospect.—

My knees knock together at so bold a request.

Ever yours affec | J D Hooker

We can get flies at Orpington.