Admiralty protections were issued under the hand of the Lord High Admiral; ordinary protections, by departments and persons who possessed either delegated or vested powers of issue. Thus each Trinity House protected its own pilots; the Customs protected whale fishermen and apprentices to the sea; impress officers protected seamen temporarily lent to ships in lieu of men taken out of them by the gangs. Some protections were issued for a limited period and lapsed when that period expired; others were of perpetual "force," unless invalidated by some irregular acton the part of the holder. No protection was good unless it bore a minute description of the person to whom it applied, and all protections had to be carried on the person and produced upon demand. Thomas Moverty was pressed out of a wherry in the Thames owing to his having changed his clothes and left his protection at home; and John Scott of Mistley, in Suffolk, was taken whilst working in his shirtsleeves, though his protection lay in the pocket of his jacket, only a few yards away. [Footnote: _Admiralty Records_ 1. 1479--Capt. Bridges, 11 August 1743. _Admiralty Records_ 1. 1531--Capt. Ballard, 15 March 1804, and enclosure.] The most trifling irregularity in the protection itself, or the slightest discrepancy between the personal appearance of the bearer and the written description of him, was enough to convert the protection into so much waste paper and the bearer into a naval seaman. North-country apprentices, whose indentures bore a 14s. stamp in accordance with Scottish law, were pressed because that document did not bear a 15s. stamp according to English law. A seaman was in one instance described in his protection as "smooth-faced," that is, beardless. The impress officer scrutinised him closely. "Aha!" said he, "you are not smooth-faced. You are pockmarked"; and he pressed the poor fellow for that reason. To be over-protected was as bad as having no protection at all. Thomas Letting, a collier's man, and John Anthony of the merchant ship _Providence_, learnt this fact to their cost when they were taken out of their respective ships for having each two protections. In short, the slightest pretext served. If a protection had but a few more days to run; if the name, date, place or other essential particular showed signs of "coaxing," that is, of having been "on purpose rubbed out" or altered; if a man's description did not figure in his protection, or if it figured on the back instead of in the margin, or in the margin instead of on the back; if his face wore a ruddy rather than a pale look, if his hair were red when it ought to have been brown, if he proved to be "tall and remarkable thin" when he should have been middle-sized and thick-set--in any of these, as in a hundred and one similar cases, the bearer of the protection paid the penalty for what the impress officer regarded as a "hoodwinking attempt" to cheat the King's service of an eligible man.