When one reads the nonfiction work of Robert Louis Stevenson along with the novels and short stories, a more complete portrait emerges of the author than that of the romantic vagabond one usually associates with his best-known fiction. The Stevenson of the nonfiction prose is a writer involved in the issues of his craft, his milieu, and his soul. Moreover, one can see the record of his maturation in critical essays, political tracts, biographies, and letters to family and friends. What Stevenson lacks, especially for the tastes of this age, is specificity and expertise: he has not the depth of such writers as John Ruskin, Walter Pater, or William Morris. But he was a shrewd observer of humankind, and his essays reveal his lively and perspicacious mind. Though he lacked originality, he created a rapport with the reader, who senses his enthusiastic embrace of life and art. If...