Although we haven't found anything else for your Mary E Douglass - hoping that somewhere along the line we may get a breakthrough by looking at the Newby / Walker families
You may need to obtain a certificate or two for confirmation when you are certain you have the correct people that relate to your family
for info. this looks to be James Walker who married Ann
Charles Walker age 1 with parents
James occ Coachman & Ann living Ford St Salford HO107; Piece: 585; Book: 6; Civil Parish: Salford ED 8; Folio: 31; Page: 7;
10 Oct 1841 Manchester, St Mary, St Denys and St George
Charles James Walker age 23 months f
James occ
Coachman m Nancy
Abode Salford, also a Bapt. on the same day to same parents Caroline Walker
The name Nancy is a variant of Ann
1846
Sarah Ann f
James Walker occ
Coachman m Ann
born 20 Aug 1844
https://familysearch.org/pal:/MM9.1.1/NY2G-VFNmarriage 14 Nov 1838
James Walker coachman Gt Ducie St Strangeways f James Lab.
Nancy Harrison 1 Stanley St Salford f John stonemason
Both single, both f/a both signed Witness Samuel & Ann Hall
It just shows how you need to study the census entries closely… I'd been looking for Elizabeth Newby born in Leek, until you pointed out it's Lech/Leck in Westmorland! Thank you!
I've been looking at Leek thinking that Leck was a spelling mistake
but then remembered I'd seen Elizabeth's pob as Westmorland on 1861 so looked again
from Genuki
LECK, a township-chapelry in Tunstall parish, Lancashire.....and on the Ingleton railway, adjacent to the boundaries with Yorkshire and Westmoreland
http://www.genuki.org.uk/big/eng/LAN/Leck/