The person you are looking for may be the following:
USGENWEB: NORTH CAROLINA: BRUNSWICK COUNTY
1840 US CENSUS - BRUNSWICK COUNTY,NC
David D. Allen - no names, just statistics
1850 - NW DISTRICT ONLY, BRUNSWICK COUNTY, NC
David D. Allen, age 45 (farmer); Calista age 29; David age 15; clarissa age 5; mary age 9/12; Clarisse Newbod 38; (may be Newbold) Duncan M. Boie 26 (physician); Martin Barefoot 29 (Labourer)(there was a Barefoot family listed in the same census, same area)
Perhaps this will give you some clues to work on...this is not my family in Brunswick County (we seek Ruarks). I have no other information. However, there is a good library in Wilmington, NC in New Hanover County...excellent genealogy room.