Hi there, thanks for taking the time to post this info on here - it's very useful. Yes, he faced this severe punishment for stealing three cheeses! That's great info regarding the Boadicea - thanks!
I have been going through the Quarterly Returns of Prisoners on FindMyPast and have compiled the dates for Henry Cookman.
He was convicted at the Wiltshire Lent Assizes on 6th Mar 1839 and was admitted onto the Leviathan Prison Hulk at Portsmouth on 28 Mar 1839.
He was then transported to Bermuda on 22 August 1839.
He was in hospital whilst there between 31 Oct - 11 Nov 1843 with Yellow Fever.
His sentence expired on 6 Mar 1846 and he was transported back to England on 15 Apr 1846.
Now to find out what next in his life!