The Art of Lecturing, by Arthur M. Lewis. Chicago: Charles H. Kerr & Company Co-operative, ca. 1907.
No date printed in the book. Original edition ca. 1907, referenced in “The International Socialist Review” Volume 8, page 318 (found at Google Books). Also mentioned in a JSTOR article.
Arthur Morrow Lewis (1873-1922) was a Socialist lecturer. This booklet primarily describes both how to give a Socialist lecture, but is useful for any type of oration.