author
S. Proctor Thayer
Best remembered as a late-19th-century schoolbook writer, this educator helped shape reading lessons for young children through the widely circulated Barnes's New National Readers. His surviving record is slim, but his name remains attached to primers that introduced generations of students to reading.
1 Audiobook
New National First Reader
by Charles J. (Charles Joseph) Barnes, Harlan Hoge Ballard, S. Proctor Thayer
About the author
S. Proctor Thayer is known today mainly through educational readers published in the late 1800s. His name appears as a co-author of New National First Reader alongside Charles J. Barnes and Harlan H. Ballard, and as the credited author of New National Third Reader, both issued by the American Book Company.
These books were designed for classroom use and focused on early reading instruction. The prefaces and later library records show Thayer's work as part of a broader effort to create practical, graded reading material for children at a time when school primers were becoming a major part of everyday education in the United States.
Beyond those publications, I couldn't confirm many personal biographical details from reliable sources available here. That makes him a somewhat shadowy figure now, but his work still offers a small window into how reading was taught in American schools more than a century ago.