Note: Within the Fremantle Website there can be found within an article called the "Prison Telegraph" the following reference, under a sub-title "What did they steal?" on page 2 column 2.
"William Douglas picked a silver watch from a gentleman's pocket."
It would appear that this is the same William Douglas who was party to the Bond with Martha Carr and Edward Hall.
Here is a link to the Fremantle Prison website where you will find Dennis Carr's record details: Prison Record Details, then locate "Carr, Dennis" on the list, and then select the display button and it will take you to his personal details.