4. _Any landsman_, above the age of eighteen, entering and employed on board such vessel for two years from his first going to sea and to the end of the voyage then engaged in, if he so long continue in such service. [The ignorance of a landsman seems to be the only reason for this exemption.] An affidavit sworn before a justice of the peace, containing the tonnage of such fishing vessel or boat, the port or place to which she belongs, the name and description of the master, the age of every apprentice, the term for which he is bound and the date of his indenture, and the name, age, and description of every such mariner and landsman respectively, and the time of such landsman's first going to sea, is to be transmitted to the Admiralty; who, upon finding the facts correctly stated, grant a separate protection to every individual. In case, however, "_of an actual invasion of these kingdoms, or imminent danger thereof_," such protected persons may be impressed; but except upon such an emergency, any officer or officers impressing such protected person, shall respectively forfeit £20 to the party impressed, if not an apprentice, or to his master if he be an apprentice.—§§ 2, 3, 4 [The phrase, "imminent danger of invasion," is susceptible of a wide interpretation for the purposes of tyranny.] VI. _General exemptions._—All persons fifty-five years of age and upward, and under eighteen years. Every person being a foreigner, who shall serve in any merchant ship, or other trading vessels or privateers, belonging to a subject of the crown of Great Britain; and all persons, of what age soever, who shall use the sea, shall be protected for two years, to be computed from the time of their first using it.—13 Geo. 2, c. 17. [The impressment of American seamen, before the war of 1812, shows how easily these exemptions may be disregarded.] VII. _Harpooners_, line-managers, or boat-steerers, engaged in the Southern whale fishery, are also protected.—26 Geo. 3, c. 50. VIII. _Mariners employed in the herring fisheries_ are exempted while actually employed.—48 Geo. 3, c. 110.