found: Sandy Spring Museum, via WWW, May 18, 2011:History (Thomas Moore (1760-1822); inventor, engineer, and intimate friend of President Jefferson; built Longwood; invented the refrigerator; Jefferson named him to lay out the national road from Cumberland to Ohio; engineered the Erie Canal, the state road from Buffalo to Albany, the Aqueduct Bridge over the Potomac, and the James River & Kanawha Canal; with brothers-in-law Isaac Briggs and Caleb Bentley, laid out the mill town Triadelphia; working with Briggs and often with Jefferson, developed new plowing and fertilizing techniques and created the National Agricultural Society)
