But there was the Captain of the Yard to convince.

To him, daily, Cecil Winwood was reporting the progress of the break--all fancied and fabricated in his own imagination.
The Captain of the Yard demanded to be shown.

Winwood showed him, and the full details of the showing I did not learn until a year afterward, so slowly do the secrets of prison intrigue leak out.
Winwood said that the forty men in the break, in whose confidence he was, had already such power in the Prison that they were about to begin smuggling in automatic pistols by means of the guards they had bought up.
"Show me," the Captain of the Yard must have demanded.
And the forger-poet showed him.

In the Bakery, night work was a regular thing.

One of the convicts, a baker, was on the first night-shift.