After residing for a period in Blauvelt, New York, Pollard then removed to Manhattan where he spent the years 1825 to 1834 practicing medicine at various locations.

"[1] "After the siege of Bexar, Pollard remained in the town as chief surgeon of the Texan garrison, on the staff of Lt. Col. James C. Neill.

He cared for the sick and wounded of the garrison and also set up a hospital within the Alamo.

On February 23, 1836, Antonio López de Santa Anna's Mexican army besieged the Alamo.

Besides William Travis, Jim Bowie, and Davy Crockett, he is the only Alamo defender of whom a portrait was done from life.