In a pamphlet published by Admiral Sir Charles Henry Knowles in 1830, when he was a very old man, he claims to have invented the new code of numerical signals which Howe adopted. The pamphlet is entitled 'Observations on Naval Tactics and on the Claims of Clerk of Eldin,' and in the course of it he says that about 1777 he devised this new system of signals, and gave it to Howe on his arrival in the summer of that year at Newport, in Rhode Island, 'and his lordship,' he says, 'afterwards introduced them into the Channel Fleet.' Further, he says, he soon after invented the tabular system of flags suggested by the chess-board, and published them in the summer of 1778. To this work he prefixed as a preface the observations of his father, Sir Charles Knowles, condemning the existing form of sailing order, and recommending Père Hoste's old form in three columns, and this order, he says, Howe adopted for the relief of Gibraltar in September 1782. He also infers that the alleged adoption of his signals in the Channel Fleet was when Lord Howe commanded it before he became first lord of the admiralty for the second time—that is, before he succeeded Keppel in December 1783. For during the peace Knowles tells us he made a second communication to Howe on tactics, of which more must be said later on. The inference therefore is that when Knowles says that Howe adopted his code in the Channel Fleet it must have been the first time he took command of it—that is, on April 2, 1782.[4]
Now if, as Knowles relates—and there is no reason to doubt this part of his story—Howe did issue a new code of signals some time before sailing for Gibraltar in 1782, and if at the time, as Knowles also says, he had been studying Hoste, internal evidence shows almost conclusively that these folios must be the Signal Book in question. From end to end the influence of Hoste's Treatise and of Rodney's tactics in 1782 is unmistakable.[5]
From Hoste it takes not only the sailing formation in three columns, but re-introduces into the British service the long-discarded manoeuvre of 'doubling.' For this there are three signals, Nos. 222-4, for doubling the van, doubling the rear, and for the rear to double the rear. From Hoste also it borrows the method of giving battle to a superior force, which the French writer apparently borrowed from Torrington. The signification of the signal is as follows: 'No. 232. When inferior in number to the enemy, and to prevent being doubled upon in the van or rear, for the van squadron to engage the headmost ships of the enemy's line, the rear their sternmost, and the centre that of the enemy, whose surplus ships will then be left out of action in the vacant spaces between our squadrons.'
The author's obligations to the recent campaigns of Rodney and Hood are equally clear. Signal 236 is, 'For ships to steer for independent of each other and engage respectively the ships opposed to them in the enemy's line,' and this was a new form of the signal, which, according to the MS. Signal Book of 1782, was introduced by Hood.[6] Still more significant is Signal 235, 'when fetching up with the enemy to leeward, and on the contrary tack, to break through their line and endeavour to cut off part of their van or rear.' This is clearly the outcome of Rodney's famous manoeuvre, and is adopted word for word from the signification of the signal that Hood added. Pigot, it will be remembered, on succeeding Rodney, added two more on the same subject, viz. (1) 'For the leading ship to cut through the enemy's line of battle,' and (2) 'For a particular ship specified to cut through the enemy's line of battle, and for all the other ships to follow her in close order to support each other.' Neither of these later signals is in the code we are considering, and the presumption is that it was drawn up very soon after Rodney's victory and before Pigot's signals were known at home.
Finally there is a MS. note added by Sir Charles H. Knowles to his 'Fighting and Sailing Instructions,' to the effect that in the instructions issued by Howe in 1782 he modified Article XXI. of the old Fighting Instructions (i.e. Article XX. of Russell's). 'His lordship in 1782,' it says, 'directed by his instructions that the line [i.e. his own line] should not be broken until all the enemy's ships gave way and were beaten.' And this is practically the effect of Article XIV. of the set we are considering. In the absence of contrary evidence, therefore, there seems good ground for calling these folio volumes 'Howe's First Signal Book, 1782,' and with this tentative attribution the Explanatory Instructions are printed below.
As has been already said, these instructions, divorced as they now were from the signals, give but a very inadequate idea of the tactics in vogue. For this we must go to the tactical signals themselves. In the present case the more important ones (besides those given above) are as follows:
'No. 218. To attack the enemy's rear in succession by ranging up with and opening upon the sternmost of their ships; then to tack or veer, as being to windward or to leeward of the enemy, and form again in the rear.' This signal, which at first sight looks like a curious reversion to the primitive Elizabethan method of attack, immediately follows the signals for engaging at anchor, and may have been the outcome of Hood's experience with De Grasse in 1782.
'No. 232. In working to gain the wind of the enemy, for the headmost and sternmost ships to signify when they can weather them by Signal 17, p. 66; or if to windward of the enemy and on the contrary tack, for the sternmost ship to signify when she is far enough astern of their rear to be able to lead down out of their line of fire.'
'No. 234. When coming up astern and to windward of the enemy to engage by inverting the line'—that is, for the ship leading the van to engage the sternmost of the enemy, the next ship to pass on under cover of her fire and engage the second from the enemy's rear, and so on.