felicitous

Walter again pursued his way, lost in a very mixed reverie; sometimes writhing under an idea of degradation, in thus making a trade of his talents; and then, again, somewhat consoled by the pride of art; for how many felicitous and stinging epigrams arose in his mind!

There are a variety of charms, of various kinds, for which there are no names and no particular uses; but they are considered felicitous, and are therefore worn by the poorer classes, who cannot buy the more valuable charms.

The same chronicler [John Capgrave] makes Henry of Agincourt die a day earlier than he really did, apparently only for the purpose of manufacturing a sort of coincidence. 'His end fell well on the feast of Saint Felix, for he was felicitous in all things—felicitous in endowing the church, felicitous in ordering more clearly the divine offices, felicitous in the administration of justice, and in fine, felicitous in all his life.[']

This sentence is grammatical; it is just not felicitous.