Further research probably can only be done on site in England and some at least must be done in London. The notation after the person's first name denotes their generation. The generations are going back from Thomas 1 York, and are noted as letters rather than numbers. The sources are mentioned in the body of the text. Further description of some sources is in the endnotes.
All locations are in England, and are in Northamptonshire unless otherwise indicated.
According to his age in the 1841 and 1851 censuses and at his death, he was born about 1778 at Long Buckby. See The Descendants of Thomas York and Mary Dickens for his marriage and children. Thomas and Alice York had children baptized in Long Buckby in 1776 and 1778. There are York families in Crick. The York entries in the Crick parish register burial index and in the baptismal register end about 1770.