As to the time allowed for SLEEP; it may be said, generally, that a sailor's watch below is at his own disposal to do what he chooses in, except, of course, when all hands are called. The meal times, and time for washing, mending, reading, writing, &c., must all come out of the watch below; since, whether there is work going forward or not, a man is considered as belonging to the ship in his watch on deck. At night, however, especially if watch and watch is not given, it is the custom in most merchant vessels, in good weather, to allow the watch to take naps about the decks, provided one of them keeps a look-out, and the rest are so that they can be called instantly. This privilege is rather a thing winked at than expressly allowed, and if the man who has the look-out falls asleep, or if the rest are slow in mustering at a call, they are all obliged to keep awake. In bad weather, also, or if near land, or in the track of other vessels, this privilege should not be granted. The men in each watch usually arrange the helms and look-outs among themselves, so that a man need not have a helm and a look-out during the same watch. A man should never go below during his watch on deck, without permission; and if he merely steps down into the forecastle for an instant, as, to get his jacket, he should tell some one, who may speak to him at once, if the watch is called upon. PART III. LAWS RELATING TO THE PRACTICAL DUTIES OF MASTER AND MARINERS. CHAPTER I. THE VESSEL. Title. Bill of sale. Registry. Enrolment. License. Documents. Certificate. Passport. Sea-letter. List of crew. Bill of health. General clearance. Clearing manifest. Invoice. Bill of lading. Charter-party. Log-book. Manifest. List of passengers and crew. Remaining sea-stores. Medicine-chest. Provisions. TITLE.--The bill of sale is the proper evidence of title to all vessels. It is the instrument of transfer which is used in all maritime countries, which courts of law look to for proof of title, and which is in most cases absolutely required.[6] [6] 5 Rob. Ad. 155. 1 Mason, 139; 2 do. 435; 4 do. 390. 16 Mass. 336. 7 Johns. 308. But see 8 Pick. 89. 16 Mass. 663. Possession of the vessel should also accompany the bill of sale, whenever it is practicable. If the bill of sale is transferred while the vessel is at sea, possession should be taken immediately upon her arrival in port. The fact of the bill of sale being with one person and the actual possession of the vessel with another, after there has been an opportunity to transfer it, will raise a presumption of fraud, and make the parties liable to losses and difficulties in dealing with creditors, and such as purchase in good faith.[7] [7] 4 Mass. 663. 4 Mason, 183. 9 Pick. 4. 6 Mass. 422; 15 do. 477; 18 do. 389.