Best Answer # 3: from Donald A. Whitelaw:
"The longest-running industry in Woodstock that is still operating is Whitelaw Machinery Co. Ltd., 572 Main Street. First established in Beachville in 1856 and moved to Woodstock in 1874, with an $8000 grant from the Town of Woodstock. It was first called the Whitelaw Company Iron Foundry."

Extra Information from Quiz Committee:
The original company, founded by Robert Whitelaw, made (steam) engines, boilers and flour mill machinery. A modern addition to the company is Whitelaw Automotive and Industrial Supply Ltd., established in 1956 and located at 575 Main Street.

Robert Whitelaw's house still exists, on Light Street, right opposite the side door of the Oxford County Courthouse.