Hi Gina
have been digging around since I last mailed you, found the family on the 1881 census with additions to your 1871 census
Michael age 14
David Snape age 25 son in law
Mary Snape age 20 daughter.
address 92 Mill Street Toxteth Park, all the people you mention before are still on there. With Mary being the oldest the marriage of Simon and Johanna could be 1860/61.
The 1891 census shows the famil still living in Toxteth Park address looks like Postance Place
Johanna 47 (may be telling a little white lie about her age) Widow, news vendor
Ellen age 12 news vendor
Margaret age 19, leather worker
Michael age 21 General Lab.
From this you can take it that Simon died between 1881 and 1891.
Of course as you say you cannot take anything for granted !! before I followed up these above census pages I looked firstly for Simon Mangan in 1891
Oxford Street, Bilston, Staffordshire
Elizabeth Southall 46, head, widow, coal dealer
Elizabeth Southall 28 dau. general servant
Stephen McMan, 23, lodger, shoemaker born bromsgrove
Simon Manken age 52, widow, born Kibrush, Co Clare, shoemaker
Ref Class RG12 Piece 2243 Folio 4
now, it looks a bit odd , the enumerator spells the name Manken and not Mangan, but they also spell the place name wrong, it should be Kilrush. I have tried (now dont laugh !) saying the name Mangan in a clare accent and it does come out as Manken sounding ! Its a bit of a long shot with him saying he is a widower and with the name spelt oddly, but I just have a feeling about it, we cannot say for sure that it isn't him. If I was you I would get in touch with St Senans Church in Kilrush and ask for birth details and marriage detail, what have you got to lose ?
Carol