I wonder about this other baptism that said 'illegitimate son of Ann Charlesworth late Senior, widow of illegible', I wonder if her maiden name was Senior or Charlesworth, she obviously was Charlesworth at the time of giving birth to William. I suppose Senior could be a made up name, but she obviously had told them that William was not of the previous 'marriage'. I am not sure if there were two Ann Charlesworths in the area who gave birth to two William Charlesworths in the same year, or the same Ann had William baptised twice. One was C of E, one was non-conformist, did C of E get at her, and tell her the baptism wasn't valid, or something. Could make up theories forever.