This might explain the Margaret/Martha discrepancy:
Marriage: 10 Jun 1884 Stowell Memorial, Salford, Lancashire, England
Joseph Ridley - 24, Policeman, Bachelor, 3 Alton Square
Margaret Hawkins - 26, Widow, 3 Alton Square
Groom's Father: Jacob Ridley, Labourer
Bride's Father: John Thom, Joiner
Witness: George Thom; Mary Thom
Married by Banns by: William Doyle Rector
Register: Marriages 1883 - 1891, Page 23, Entry 45
Source: Lancashire Online Parish Clerks citing LDS Film 2358235
Deaths Sep 1888
RIDLEY Margaret - aged 30 - Salford 8d 20
Marriage: 6 Jul 1891 St Thomas, Pendleton, Lancashire, England
Joseph Ridley - 31, Police Constable, Widower, 16 Mary St.
Martha Lambert - 26, Spinster, 207 Ellor St.
Groom's Father: Jacob Ridley, Labourer
Bride's Father: William Lambert, Publican
Witness: Robert Haugh; Sarah Spence
Married by Banns by: George Morgan
Register: Marriages 1885 - 1894, Page 148, Entry 295
Source: Lancashire Online Parish Clerks citing Manchester Central Library
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Alexander RIDLEY & Margaret DOEL married 1918 at St Nicholas, North Bradley
Source:
http://www.wiltshirebmd.org.uk/Deaths Sep 1963
RIDLEY Margaret A - aged 63 - Middleton 10e 389
RIDLEY Margaret Annie of 4 Norman Street Middleton
Lancashire Widow died 7 July 1963 Administration
Manchester 20 August to Sidney Joseph Ridley railway
clerk. Effects £328 14s.
Source:
https://probatesearch.service.gov.uk/#willsADDED:I can only find one marriage of a Mr RIDLEY to a Miss DOEL, which is the 1918 one.
In case you are unaware there appears to be a possible
5 children from this marriage.