Thank you Spendlove. I searched online at National Archives for the name and Millbank Prison and was directed to a Find My Past page where I found this:-
First name(s)Last name Birth year Year Place Series
Abraham Gillott 1820 1855 Portland HO24
The record is just a line on a register
Abraham Gillott age 35 Married, 4 children, Imp (read or write), Framework Knitter, convicted 7 march 1855, crime: housebreaking after pre con, sentence: ten years PS, received on 16 April 1855, from Nottingham prison, Eight times in prison, removed on 7 dec 1855 to Portland prison.
there are several other records which have already been referred to earlier and also one for an offence committed when he was 23 and sent to Derby prison