Coming to the navy of the Commonwealth, we find the same curiously named guns in use. Here is the battery of the _Naseby_: Nineteen cannon, nine demi-cannon, twenty-eight culverins, thirty demi-culverins, and five sakers. The same classification lasted till the time of George I, when it became the custom to designate guns by the weights of their projectiles. Thenceforward we find ship-armaments reckoned in 42-pounders, 32-pounders, 24-pounders, 12-pounders, and 6-pounders. The old 60-pounder had disappeared, and before long the 42-pounder followed it into temporary oblivion, so that at Trafalgar our heaviest gun was a 32-pounder.[41] It was not until nearly 1840 that it reappeared, and was followed by a 68-pounder. During the period between Elizabeth and Trafalgar there were innumerable attempts to invent and introduce improved forms of ordnance, including shell-guns and machine-guns. The idea of the latter was extremely ancient. There are several manuscript illuminations and old wood-cuts of the fourteenth and fifteenth centuries showing attempts at a "Maxim" gun. The "orgue", consisting of a large number of very small guns or musket-barrels fixed in rows, or revolving rings, or bundles, was a common weapon in those centuries--at least on shore. Then there was something of the kind for which William Drummond was given a patent in 1625, and which he termed a "thunder carriage". Again, there was one Puckle, who in 1781 invented a regular revolving gun mounted on a tripod. It was made in two patterns--one to fire ordinary round bullets, the other to fire square ones--against the "unspeakable Turk". Puckle thought these infidels ought to get as nasty a wound as possible. With his specification he issued a doggerel which ran as follows:-- A DEFENCE! "Defending King George, your country and Lawes Is defending yourselves and Protestant Cause". The invention did not "catch on", and under a picture of the weapon which appeared on the eight of spades in a pack of cards of the period was another attempt at poetry: "A rare Invention to destroy the Crowd Of Fools at Home, instead of Foes Abroad. Fear not, my Friends, this terrible Machine; They're only wounded that have Shares therein".