The responsibility for jail-bird recruiting did not of course rest with the gangs. They saw the shady crew safe on board ship, that was all. Yet the odium of the thing was theirs. For not only did association with criminals lower the standard of pressing as the gangs practised it, it heightened the general disrepute in which they were held. For an institution whose hold upon the affections of the people was at the best positively negative, this was a serious matter. Every convict whom the gang safeguarded consequently drove another nail in the coffin preparing for it. The first and most lasting effect of the wholesale pumping of sewage into the fleet was to taint the ships with a taint far more deadly than mere ineptitude. A spirit of ominous restlessness prevailed. Slackness was everywhere observable, coupled with incipient insubordination which no discipline, however severe, could eradicate or correct. At critical moments the men could with difficulty be held to their duty. To hold them to quarters in '97, when engaging the enemy off Brest, the rattan and the rope's-end had to be unsparingly used. [Footnote: _Admiralty Records_ 1. 5125--Petition of the Company of H.M.S. _Nymph_, 1797.] In no circumstances were they to be trusted. Given the slightest opening, they "ran" like water from a sieve. To counteract these dangerous tendencies the Marines were instituted. Drafted into the ships in thousands, they checked in a measure the surface symptoms of disaffection, but left the disease itself untouched. The fact was generally recognised, and it was no uncommon circumstance, when the number of pressed men present in a ship was large in proportion to the unpressed element, for both officers and marines to walk the deck day and night armed, fearful lest worse things should come upon them. [Footnote: _Admiralty Records_ 1. 1499--Capt. Bennett, 22 Sept. 1799, and Captains' Letters, _passim_.] What they anticipated was the mutiny of individual crews. But a greater calamity than this was in store for them.