This handful of men were tied to very hard duty.

An analytic function is transcendental (i.e., is a transcendental function) if and only if its Riemann surface is noncompact.

Conversation of this type, comfortably fed and armchaired men discussing in the presence of deferential wives, was the recreation of his less frivolous leisure.

The memoir's occasion is frequently quite simple: this is a good story to tell, with lively characters given a vervy charge by having actually existed.