On the 1939 register on FMP, living at 3 Loxley Road Sheffield
Sydney Mount dob 5 May 1877
Bertha Mount dob 15 Jun 1879

Sydney Mount died in 1947 in Sheffield.

Bertha Mount dob 15 Jun 1879 died Dec 1976 Bakewell Derbyshire age 97.

Hope this helps.
Sue

Just to complete the evidence, the GRO Index confirms that Bertha Barnsley born Q3 1879 had MMN Clark.
Dave

Wow that is impressive.

Thank you so much for your help. I've sorted out some more Barnsleys. Many more to sort through.

cheers