I have come across quite a baffling situation.

Archibald Wilson (1878) & Elizabeth Ferguson (1878) married at Morpeth District in 1901 in Northumberland.
There are two births registered a few pages from eachother
Mary Elizabeth Ferguson Wilson Morpeth 10b 457
Elizabeth Ferguson Wilson Morpeth 10b 462
Elizabeth Snr died as a result from childbirth on 23 January 1902 at Scotland’s Gate, aged 24.
Mary E F is quite easy to trace, she is with her uncle Robert Ferguson in the 1911 and 1921 census at Ashington. She was baptised on 26 January 1902 at Choppington.
However I’ve no sign of “twin” Elizabeth F.
Elizabeth F according to birth record was born 6 January 1902 at Scotland Gate. This was signed by her father on the 20 Feb 1902. Her mother is not marked deceased.
However Mary E F’s birth shows a difference, her mother Elizabeth is marked as deceased and the informant is her uncle Robert Ferguson “in charge of the child”. Registered on the 10 Feb 1902.
Any help would be greatly appreciated.