Thanks normamac and mckha489,
here is the info:
Carl Williams Petersen
1861–1936
Last occupation: Domestic Machinery Dealer. Last known residence: Wood Green, Middlesex, England
Birth 21 JAN 1861 • Totnes, Devon, England
Death 4 MAR 1936 • Essex, England
Louisa Treby
1852–
Birth 16 JUL 1852 • Dartmouth, Devon, England
Death Unknown
Petersen children: Thomas George, Carl Ernest, Ethel Mary
I was able to find evidence of probate on Carl, but nothing on Louisa.
I thought the 1921 census was lost! If not can you advise me how to find it?
Nothing came up in Findmypast, Essex Burial Index. 1590-1950.
I will try Free BMD, and newspapers—thank you!