Read it through once

Karshish, the picker-up of learning’s crumbs, The not-incurious in God’s handiwork (This man’s-flesh he hath admirably made, Blown like a bubble, kneaded like a paste, To coop up and keep down on earth a space That puff of vapor from his mouth, man’s soul) --To Abib, all-sagacious in our art, Breeder in me of what poor skill I boast, Like me inquisitive how pricks and cracks Befall the flesh through too much stress and strain, {10} Whereby the wily vapor fain would slip Back and rejoin its source before the term,-- And aptest in contrivance (under God) To baffle it by deftly stopping such:-- The vagrant Scholar to his Sage at home Sends greeting (health and knowledge, fame with peace) Three samples of true snake-stone--rarer still, One of the other sort, the melon-shaped (But fitter, pounded fine, for charms than drugs), And writeth now the twenty-second time. {20}