Stephen Bull - UK Prison Hulk Register assistance

I am trying my upmost to find further information regarding Stephen Bull estimated birth year 1813. Record as seen on Ancestry. UK Prison HULK Register and Letter Books 1802 - 1849. Date received 12th July 1836 - Ship Leviathan - Place moored Portsmouth - Date Convicted 28th June 1836 - Place Convicted - Guilford, Surrey. Could this be my ancestor? Trying to source a record showing his DOB, middle name, family address at the time, anything which will help be determine his creditability. Any assistance you can offer is appreciated.