He woke to a sense of new riches; he had the feeling of a boy waking to a birthday.
But when the next moment brought him his memory, he found nothing that could explain his exhilaration.

On the contrary, under the circumstances it seemed grotesquely unwarranted.

However, it was a brief visitation and was gone before he had finished dressing.

It left a little trail, the pleased recollection of it and the puzzle of it, which remained unsolved.

And, in fact, waking happily in the morning is not usually the result of a drive home from a funeral.