WALDO, Albigenee, surgeon, born in Pomfret, Connecticut, 27 February, 1750; died in Windham county, Connecticut, 29 January, 1794. He was educated by the clergyman of his native town, studied medicine, and acquired an extensive practice. On 1 July, 1775, he was appointed surgeon's mate of the 8th regiment, under Colonel Jedediah Huntington, which was then stationed in Roxbury, but, owing to impaired health, he was discharged on 6 September, 1775. On 14 December, 1776, he was appointed by the committee of war of Connecticut chief surgeon of the ship "Oliver Cromwel," and on 3 April, 1777, he joined Colonel Huntington's newly raised regiment as surgeon, and served in the campaigns in New Jersey and Pennsylvania. At Monmouth and Valley Forge his professional service in the inoculation for small-pox gained him much reputation. He was a friend of David Humphreys, who in his "Life of General Putnam," acknowledges Dr. Waldo's aid in its compilation. He was a founder of the Medical society in Windham county, which was the first society in Connecticut. Dr. Waldo left numerous medical and surgical treatises in manuscript, illustrated by well-executed drawings, and also a large collection of valuable historical documents. His diary at Valley Forge was published in the "Historical Magazine" (New York, 1861).