Drew Convicts from Cornwall

Ancestry.com.au has made available the convict registers, free for 10 days. So, being a nosey parker, I signed up for the free trial and had a peep. This is what I found:

Name:	Edward Drew
Vessel:	Mangles
Convicted Date:	22 Oct 1834
Voyage Date:	24 Apr 1835
Colony:	Van Dieman's Land
Piece:	HO 11/10
Place of Conviction:	Cornwall
County of Conviction:	Cornwall

Edward was sentenced to 7 years. He was convicted at Falmouth Second Sessions. On the original, he is bracketed with Robert Roberts.

Name:	Peter Drew
Vessel:	Fame
Convicted Date:	25 Mar 1816
Voyage Date:	9 Oct 1816
Colony:	New South Wales
Piece:	HO 11/2
Place of Conviction:	Cornwall
County of Conviction:	Cornwall

Name:	Samuel Drew
Vessel:	Fame
Convicted Date:	25 Mar 1816
Voyage Date:	9 Oct 1816
Colony:	New South Wales
Piece:	HO 11/2
Place of Conviction:	Cornwall
County of Conviction:	Cornwall

Peter and Samuel seemed to have some connection with William Mallet the Younger, as they are bracketed together on the original page. All three were sentenced to life, convicted at the Cornwall Assizes.

Now, where do we find out what they were convicted for, and were they connected in any way to our mob?