Ok its highly unlikely he's still wandering round Liverpool (or anywhere else) but I am running out of options here :-)
Any straws to clutch at would be gratefully accepted!
What I know/ have documented:
1823 Baptism 28 March Llanferres, Denbighshire parents John , a miller, and Catherine
1841census Llanferres Piece 1405/ Folio 24/ Page 16, age 15, believed hiding under an inkblot on image.
1851 census Llanferres Piece 2504/ Folio 113/ Page: 17, age 28, occ miller’s son
1854 birth of illegitimate son. John Owen BARTLETT, q1 1855, Ruthin Union MMN blank. Have cert. Baptised 7 Jan 1855, Llanferres, (as Barklet) Edward's name originally in register but then crossed out, and replaced with just Mary Ann's name and she is recorded as a spinster
1856 Marriage 01 Dec, St Clement, Liverpool to Mary Ann Bartlett, groom's father John a miller
1857 birth child 2 Q2 West Derby 8b 414, Catherine, MMN Bartlett, no baptism found yet, not yet got cert
1860 birth child 3 Q1 West Derby 8b 256, , Edward Henry, MMN Bartlett, baptised 10 Jun St Clement's church, address 1 Windsor View, father: labourer, not yet got birth cert
1861 census Windsor View, Toxteth Park, Liverpool Piece 2708 / Folio 50/ Page 41age 38, occ: grocer/ provisions dealer.
1863 birth child 4, Mary Elizabeth, Q2 1863 West Derby 8b 497 MMN Bartlett,not yet got cert. Baptised St Peter's, 7th May 1863, address Wavertree Road, father: labourer
1865 birth last child, Sarah, birth cert father Edward, a labourer, address 9 Ryder St
Mum, Mary Ann, nee Bartlett, registered birth. Not yet found baptism Now supplied by lansann, see reply 4,thank you
1868 12 Apr, death last child, Sarah, age 2, address 17 Arrow St., death cert says‘ daughter of Edward Parry, a labourer, deceased’, Mum, Mary Ann, registered death
1871 census Arrow St. Liverpool, Piece 3842/Folio 48/ Page 49 Mary Ann is listed as a widow
Later marriage records for their children give Edward's occupation as iron driller or safe maker
1867 Q2 deaths West Derby 8b 231 age 49 - have the death cert and don't believe its him Address is 36 Robertson St, age 49, occupation blacksmith journeyman, informant Eliza Parry same address - no sign of an Eliza at any stage connected to my Edward Parry. Now definitely discounted, per info from jonw65, replies 11 & 12, thanks