My Jan/Feb, 2009, D.A.R. Newsletter head the following informtion:
"Hezekiah Alexander's stone house (pictured) is probably the only surviving tructure belonging to a framer of North Carolina's constitution.It sits on land near Sugar Creek bought by Alexander from his brother, John McKnitt Alexander, in 1767.The brothers were born in Cecil County, Maryland and moved to Mecklenburg County, NC, sometime after 1754.Both brothers were active in civic affairs and prominent patriots during the Revolution.Hezekiah was an elder in Sugaw Creek Presbyterial Church, a trustee of Queens College (chartered in 1771), and in 1775 a member of the Mecklenburg Committee of Safety.In 1776 he joined other state delegates at Halifax to form the Fifth Provincial Congress which wrote the first state constitution.After that Congress, Hezekiah joined the Fourth Regiment of North Carolina Troops as Paymaster."
There is a little more information on the house and it is "the centerpiece of the Charlotte Musuem of History campus on Shamrock Drive."
I am not researching this family, and have no further information.