Christened 20/02/1835 at St Peter's church, Monkwearmouth.
Miller of Sunderland aged 22y when he married Betsy Crosby from Robin Hood's Bay in 1855.

1871 census for 2 Hamilton Street, Monkwearmouth, Sunderland:

Name	Relation	Age	Occupation	Where born
Martin Crosby	Head	36	Miller	Durham Sunderland
Ellen Crosby	Wife	36	Dress maker	Durham Sunderland

Although this Martin is of the same age, geographical origin and relatively unusual profession as the Martin who married Betsy in 1855, his wife by 1871 appears to be Ellen. There is a record of that Henry Martin Crosby, 33y, son of Martin Crosby married Ellen Hylton Thomas, 35y, daughter of William Thomas in Bishopwearmouth on 04/05/1868.