I'm a new member to the society and this is my first post on the forum, so hello to everybody! I've got lots of questions which I'm hoping I can get some help with.

My question concerns my great-granddad, William Murray, possibly born in Ireland or St. Helens in 1847/1850. He appears on most censuses, except for the 1871. In the 1861 census, he's listed as living in Parr, St. Helens with his parents Bernard and Susan Murray and his siblings (Class: RG9; Piece: 2752; Folio: 17; Page: 26; GSU roll: 543023). In 1881, he's on Davies Street, Widnes, with his wife Sarah (nee Thompson, born Great Harwood 1847), her daughter Lily (1874, Bury) and their son John (1879, Church). (Class: RG11; Piece: 3726; Folio: 104; Page: 27; GSU roll: 1341892). In 1891, he's in Bradford, Manchester with the same family (Class: RG12; Piece: 3256; Folio 103; Page 44; GSU roll: 6098366) and then he disappears. I can't find a death certificate for him, but in the 1901, Sarah is shown as a widow living with her son John in Manchester (Class: RG12; Piece: 3256; Folio 103; Page 44; GSU roll: 6098366).
I can't find either William or Sarah on the 1871 census. I know they marry after Lily's birth but before John's. In his early life, Williams is a labourer in a glass works, and later, he is a labourer in a chemical works. Can anybody shed any light on this and perhaps tell me whether electoral rolls for Widnes or St. Helens are online somewhere?
Thanks very much for any help! Looking forward to hearing from you!
Angela