Ulla didn't got everything right. In AII:1b it is the son Erik who died 1900-07-08. Next they are found in Arbrå (X) AIIa:2b (1901-1905) Bild 3120 / sid 646 (AID: v225449.b3120.s646, NAD: SE/HLA/1010005) and there Hans Ersson died 1906-01-24, Per and Hans moved to Amerika and Per returned. Next they are found in Arbrå (X) AIIa:3c (1906-1910) Bild 2190 / sid 893 (AID: v225466.b2190.s893, NAD: SE/HLA/1010005) where Peer is married in 1907, starts a family and became the owner of the farm Åkre no 2. Next they are found in Arbrå (X) AIIa:4c (1911-1918) Bild 2020 / sid 878 (AID: v225469.b2020.s878, NAD: SE/HLA/1010005) where Per has 6 children. Jonas is noted as being in Amerika but he has not told the priest when he moved, thus he is transfered to Obefintlighetsboken, where people that they don't know where the live are noted. Kerstin Persdotter still lived 1918 when they all moved to N. B. = Nya Boken = Next volume, which is how you find them in next volume at that time. For older times you usually have to find them at the same place using an index of places often found in the beginning of the volume (or sometimes at the end).