Hazel,
I can't help you with Erasmus, but I wonder if you have come across Temperance Tippett?
Temperance Tippet
B: 1730 St. Mary's Co., MD
D: After 1794
Spouse: James Vessels
B: about 1740
Mar: About 1762
Children: Mary Ann, William, John, James, Susanna
Elisha, Charles, Elizabeth, Ellender, Benjamin
Good luck in your search. If I run across Erasmus I will keep you in mind.
Joe Holland