author
A longtime teacher and textbook writer, he focused on helping students become clearer, more confident readers and writers. His work has been associated with practical guides to expository writing and classroom learning.

by Mervin James Curl
Mervin James Curl appears to have been an educator best known for writing instructional material on reading and writing. A Google Books listing for Expository Writing identifies him as the author of a classroom-focused text, which suggests his work was aimed at helping students build strong, usable communication skills.
Reliable biographical information about his life is limited in the sources I could confirm here, so a fuller personal profile is not easy to verify. Based on the available record, he is best described as a teacher-author whose published work supported practical learning in the classroom.