When we observe good workmanship, whether it be by a stone-mason, a cabinet-maker, or a writer, we may be sure that it has cost much patient labor. His biographer tells us that Moore thought ten or fifteen lines in twenty-four hours a good day's accomplishment in poetry; and at this rate he wrote "Lalla Rookh."[52] Wordsworth wrote his verses, laid them aside for weeks, then, taking them up, frequently rewrote them a score of times before he called them finished. Buffon's "Studies of Nature" cost him fifty years of writing and re-writing before the work was published. John Foster, the profound and eloquent English essayist, often spent hours upon a single sentence. Ten years elapsed between the first sketch of Goldsmith's "Traveller" and its final completion. Rochefoucauld[53] spent fifteen years over his little book of Maxims, altering some of them thirty times. Rogers admitted that he had more than once spent ten days upon a single verse before he turned it to suit him. Vaugelas, the great French scholar, devoted twenty years to his admirable translation of "Quintus Curtius." Some authors have produced with such rapidity as to approach improvisation. Perhaps the most remarkable instance of this was in the case of Lope de Vega, who composed and wrote a versified drama in a single day, and is known to have done so for seven consecutive days. Contemporary with Shakespeare and Cervantes, De Vega has left behind him two thousand original dramas sparkling with vivacity of dialogue and richness of invention. Soldier, duellist, poet, sailor, and priest, his long life was one of intense activity and adventure.[54] The name of Hardy, the French dramatic author and actor, occurs to us in this connection; though an inferior genius to De Vega, he wrote over six hundred original dramas. He was considered the first dramatic writer of the days of Henry IV. and Louis XIII., before whom Hardy often appeared upon the stage personating the heroes of his own dramas.