Paul,
The first burial entry at Blackhill Cemetery was 25th May 1862 and prior to that Catholics within this catchment area would normally be buried at the Brooms Churchyard.
The following appear to relate to your family:
Ann Shannon daughter of Patrick Shannon aged 2 of 96, Blackhill buried 11th August 1862. Section Aa No 578.
Hannah Shannon daughter of Patrick Shannon aged 10 months of 46, Bottle Bank buried 29th January 1873 Section Ab No 165.
Margaret Shannon wife of Patrick Shannon aged 43 of 46, Bottle Bank buried 5th November 1873 Section A No 6.
Patrick Shannon Labourer aged 72 of 47, Bottle Bank buried 8th March 1910 Section 17 No 566.
Mary Elizabeth Shannon daughter of Thomas Shannon aged 14 months of 45, Kings Street, Consett buried 11th March 1912 Section 17a 543.
To progress with your Kelly line you need to know the name of John Kelly's father.
Good luck,
J.T.A.