author
1826–1909
A 19th-century American physician and writer, he is best remembered for vivid, sensational accounts tied to the Civil War era and the expanding American West. His books mix reportage, patriotism, and popular history in a style meant to grip ordinary readers.

by I. Winslow Ayer
Born around 1826, Isaiah Winslow Ayer was an American physician who published under the name I. Winslow Ayer, often adding the title M.D. Catalog and author records connect him with works including The Great North-Western Conspiracy in All Its Startling Details, The Great Treason Plot in the North During the War, Ayer's Monitor of Health, and Life in the Wilds of America, and Wonders of the West in and Beyond the Bounds of Civilization.
His best-known writing centers on the Civil War and its political tensions, especially alleged secret plots and disloyal movements in the North. At the same time, his broader bibliography shows an interest in health advice and in telling dramatic stories about frontier life, which helped place him within the lively, popular nonfiction culture of the 1800s.
Reliable online records for his life are fairly sparse, and the biographical details that appear most consistently are that he was an American physician, was born about 1826, and died in 1909. I couldn't confirm a suitable portrait image from the sources reviewed, so none is included here.