Hi Sue. I realize your message is quite old and you likely have all your information by now. I have recently been researching the Vaudin line (my hubby's side). Your grandfather, William Vaudin, was born April 27, 1882 at New Villa, La Tounelle, Vale Rd., St. Sampson, Guernsey, Channel Islands. He died Nov. 1, 1955 at Eventide Home. Eaton Place, Les Gravees, St. Peter Port, Guernsey, Channel Islands. Yes, he was married twice, the first being Mary Agnes Langlois, born 1881, (your grandmother) and Mabel Grace Tostevin born 1884. William was a journalist for and the editor of the Guernsey Evening Press for most of his adult life. He was also an artist of some reknown and a church organist. Talented guy. He was the editor of the newspaper during the German occupation of the Islands and designed the currency of the time.
Hope you have all this already but, if you don't, please feel free to use it.