Commenting on a house-party which I had described, he adds:
All we can do, my dear Stephen, is to ask you to remember the old adage:
Birds of a feather flock together;
and the modern variants:
Birds of a beak meet twice a week;
Birds of a voice share a Rolls-Royce;
Birds of a kidney are Alf and Sydney;
Birds of a tail are hail-fellow-hail;
Birds of a crest are twins of the best;
Birds of a gizzard are witch and wizzard;