. . "The Roaring Trumpet"@en . . . . "The Roaring Trumpet is a fantasy novella written by science fiction and fantasy authors L. Sprague de Camp and Fletcher Pratt as the initial story in their Harold Shea series. It was first published in the May 1940 issue of the fantasy pulp magazine Unknown. It first appeared in book form, together with its sequel, \"The Mathematics of Magic,\" in the collection The Incomplete Enchanter, issued in hardcover by Henry Holt and Company in 1941, and in paperback by Pyramid Books in 1960."@en . . . . . . .