His death:
23141/1919 PICKERING John G father JOHN @ HELENSBURGH
Her death:
11382/1931 PICKERING Mary 85 YRS HELENSBURGH
I can’t see a suitable UK marriage.
This is a birth closeish to his birth year:
PICKERING, JOHN GEORGE mmn GIBSON
GRO Reference: 1848 J Quarter in DURHAM AND LANCHESTER Volume 24 Page 103
PICKERING, MARGARET ELLEN mmn GIBSON
GRO Reference: 1867 M Quarter in DURHAM Volume 10A Page 360
PICKERING, JOSEPH mmn GIBSON
GRO Reference: 1861 J Quarter in DURHAM Volume 10A Page 297
PICKERING, ALICE mmn GIBSON
GRO Reference: 1859 S Quarter in DURHAM Volume 10A Page 273
PICKERING, SARAH ANN mmn GIBSON
GRO Reference: 1855 D Quarter in DURHAM Volume 10A Page 226
PICKERING, HANNAH mmn GIBSON
GRO Reference: 1854 J Quarter in DURHAM Volume 10A Page 242
PICKERING, MARY JANE mmn GIBSON
GRO Reference: 1852 S Quarter in DURHAM Volume 10A Page 187
PICKERING, JOSEPH mmn GIBSON
GRO Reference: 1850 J Quarter in DURHAM AND LANCHESTER Volume 24 Page 102
PICKERING, ELIZABETH mmn GIBSON
GRO Reference: 1846 J Quarter in DURHAM AND LANCHESTER Volume 24 Page 98
PICKERING, MARY JANE mmn GIBSON
GRO Reference: 1844 J Quarter in DURHAM AND LANCHESTER Volume 24 Page 85
Possible parents of above:
Mar 1843 Auckland 24 13
PICKERING Richard
GIBSON Isabella
1851 and 1861 census:
https://www.familysearch.org/ark:/61903/1:1:SGJY-M89https://www.familysearch.org/ark:/61903/1:1:M782-77FThis is all conjecture of course, given that the death cert has father’s name as John and the birth year is at odds with age at death.
Jamjar