By 1900s the "ancient" parish sway over surrounding areas had dissipated. So Blyth was independent of Horton and Earsdon parishes and independent of the "townships" of Cowpen and Newsham.
St Mary's in the market place, once a "chapel of ease" of the "mother" church at Horton, became an independent parish. Likewise St Cuthbert's, at the "south Blyth" end of Blyth, once a chapel of ease of Earsdon Parish, became independent parish
So the above pertains to the Church of England.
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The Catholic church was not part of that hierarchy. First in the area was St Cuthbert's church at Cowpen Village/Cowpen Newtown, built 1840s, This served RC folk in surrounding area, including, Cowpen, Bebside , Blyth, Bedlington, Seaton Delaval etc.
( In era 1811 - 1820 a French RC priest was serving catholics without a standing church.. using houses etc... supposedly the Sidney Arms pub)
At that time , after 1840, nearest alternative RC churches were at Morpeth, North Shields and Newcastle.
St Wilfred's opened in Blyth c1860.
Bedlington catholics continued to cross the River Blyth to use St Cuthbert's, Cowpen.
Bedlington catholics got their own church, St Bede's in c1876.
But for whatever reason, when the Bishop visited St Cuthbert's , Cowpen to confirm the children, on 25 May 1879, he did 70 Bedlington children and adults. I have a list of their names and ages.
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A wee bit of trivia... RC churches at Cowpen, Blyth, Bedlington etc, were staffed not by secular priests , but by Benedictine (O.S.B) priests.
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Of the Irish arriving in the counties of Northumberland and Durham in mid 1800s, most were from County Mayo ( then Sligo, etc)
Michael Dixon
(bapt/confirmed at St Cuthbert's, Cowpen, before the Devil got me ! )