The last of Joseph and Jane Dalton's children, recorded on the 1850 census, are Jane and John. The census was enumerated on September 19, 1850 in Upland, Delaware County, Pennsylvania. Jane was four years old and John was 1 month old. They appear again on the 1860 census as fourteen and ten year old children. After this census they disappear from records. Three possibilities arise as to their whereabouts - 1) they both died between 1860 and the 1870 census; 2) they moved to another county or state working as an apprentice, teacher or the pursuit of another occupation and possibly boarded with relatives or another household; 3) one or both married and relocated.