Pip, I was using the source provided in the profile of John Box, the "ancient planter" Box-113. It clearly says he had no son. His wife was Mary Hues and they had a daughter named Mary and she inherited his land when John and Mary,the wife had both died.
In checking the status of John Box, the "ancient planter" just now I see that Liz has fixed that profile....but the John Box, Jr. still lives as Box-110 based upon the same documentation.
Thanks for your interest,