On reaching the chapel he found, to his dismay, that the chapel was as cellular as any other part of the prison; it was an agglomeration of one hundred sentry-boxes, open only on the side facing the clergyman, and even there only from the prisoner's third button upward. Warders stood on raised platforms and pointed out his sentry-box to each prisoner with very long slender wands; the prisoner went into it and pulled the door (it shut with a spring), and next took his badge or number from his neck and hung it up on a nail above his head in the sentry-box. Between the reading-desk and the male prisoners was a small area where the debtors sat together. The female prisoners were behind a thick veil of close lattice-work. Service concluded, the governor began to turn a wheel in his pew; this wheel exhibited to the congregation a number, the convict whose number corresponded instantly took down his badge (the sight and position of which had determined the governor in working his wheel), drew the peak of his cap over his face, and went out and waited in the lobby. When all the sentry-boxes were thus emptied, dead march of the whole party back to the main building; here the warders separated them, and sent them, dead silent, vizors down, some to clean the prison, some to their cells, some to hard labor, and some to an airing in the yard. Robinson was to be aired. “Hurrah!” thought sociable Tom. Alas! he found the system in the yard as well as in the chapel. The promenade was a number of passages radiating from a common center; the sides of passage were thick walls; entrance to passage an iron gate locked behind the promenader. An officer remained on the watch the whole time to see that a word did not creep out or in through one of the gates. “And this they call out of doors,” grunted Robinson.