Yes Lawson Armstrong Swallow seems to be a popular name

a few trees on Ancestry has his parents as John Swallow and Eleanor Forrest which you would need to check
I did find a census record 1861 civil parish Seaton Delavel ..Seghill Northumberland
John Swallow age 76 b Whitrington Northumberland occupation cartman
Eleanor Swallow age 67 b Amble Northumberland
Mary Swallow age 12 b Felton Northumberland so could this be Mary Jane ?
1861 Census the mother Anne is still with her father Charles Emery only one child there and she is down as Mary Anne Armstrong age 8 born Felton ..
Can not find Lawson Armstrong Swallow in the 1841 census but maybe he was a sea his death gives his age as 27
Rosie