This may be of some help.
There is a Peter Fred Petersen on the index of Grimsby sea fishing apprentices 1880-1937.
PETERSEN Peter Fred 3 Oct 1891 208/1/8/167
The date is the date of indenture, & the numbers at the end refer to the registers, which are kept at the North East Lincolnshire Archives, in Grimsby .
Among the details included in the original registers are a boy’s birthdate, place of birth, next of kin, name of master and of first vessel, previous employment, and disciplinary record. Sometimes a note of a newspaper report – usually a court appearance – is added.
Contact info:
North East Lincolnshire Archives
Town Hall, Town Hall Square,, Grimsby, North East Lincolnshire, DN31 1HX
Telephone: 014172-323585
Opening Times:
Monday: 9.30-12.30, 1pm-4pm
Tuesday: 9.30-12.30, 1p-4pm
Wednesday: 9.30-12.30, 1pm-4pm
Thursday: 9.30-12.30, 1pm-4pm
Friday: Closed to the public
Saturday: Closed
Sunday: Closed
Bank Holidays: Closed