Mary Dronfield died early in 1891 so in the census of that year William is described as a widower
1891 Census
William Dronfield
Head
Widower
71
Shoemaker
Staveley, Derbyshire, England
Job Dronfield
Son
Single
44
Colliery engine driver
Staveley, Derbyshire, England
Joseph E Dronfield
Son
Single
26
Colliery engine driver
Staveley, Derbyshire, England
William Dronfield died in 1899 aged 79.