"_His knowledge of music is something quite phenomenal_;" _i.e._, "He
knows, and can talk about, absolutely nothing else."
"_Would be quite lovely, but for a certain_ je ne sais quoi _which
repels most people_;" _i.e._, "Beautiful beyond all criticism that is
not vaguely venomous."
"_You dear thing_!" _i.e._, "You inconsequent little noodle!"