I wonder if this could be a marriage for him? I don't see Harriet anywhere on the 1851/61/71.
March 27, 1846 - Lincolnshire Chronicle - Lincoln, Lincolnshire, England
Spalding, on the 20th inst.. Mr. Henry Walker, master Mariner, to Miss Harriett Hall, of that place.
March 7, 1873 - Stamford Mercury - Stamford, Lincolnshire, England
At Spalding, on the 20th ult.. Harriet wife Henry Walker, master mariner, aged 52
Maureen