Meanings of perspicuously in English

I detected him at once, of course. The eye-glass glittered perspicuously.

Does it not follow that by drilling ourselves to write perspicuously we train our minds to clarify their thought?

He read to me part of a tale never put into the ordinary edition, translated into English tersely and perspicuously.

He is cramped, or as the vulgar more perspicuously and therefore more fittingly and elegantly put it, his mind is stuck on himself.

But the enthusiastic character, or he who is divinely inspired, unfolding the truth itself concerning the gods essentially, perspicuously ranks among the highest initiators.