"_How delightful it must be to have such a hobby!_" _i.e._, "Thank
heavens, I am not so afflicted!"
"_It must have cost you a heap of money_;" _i.e._, "How he's been
'done'!"
"_What a wonderful collection of pictures you have here!_" _i.e._, "Must
say something. Wouldn't give ten pounds for the lot."