Technically, our national banner should be called the Union Flag, though in ordinary parlance it is always called the Union Jack. {48} The latter flag is a diminutive of the former, and the term ought in strictness to be confined to the small Union Flag flown from the Jack-staff on the bowsprit of a ship. The Union Flag is, besides this, only used as the special distinguishing flag of an Admiral of the Fleet, when it is hoisted at the main top-gallant mast-head, and when the Sovereign is on board a vessel, in which case the Royal Standard is flown at the main and the Union at the mizen. With a white border round it, as in Fig. 104, it is the signal for a pilot: hence this is called the Pilot Jack. The sea flags now in use are the white, red, and blue ensigns, Figs. 95, 96, 97, to be hereafter described, while the Union flag is devoted especially to land service, being hoisted on fortresses and government offices, and borne by the troops. Why the flag should be called "Jack" at all has been the subject of much controversy. It is ordinarily suggested that the derivation is from Jacques, the French word for James, the Union Jack springing into existence under his auspices. Why it should be given this French name does not seem very clear, except that many of the terms used in blazonry are French in their origin. It never seems to have been suggested that, granting the reference to King James, the Latin Jacobus would be a more appropriate explanation, as the Latin names of our kings have for centuries supplanted the earlier Norman-French on their coins, seals, and documents. Several other theories have been broached, of varying degrees of improbability; one of these deriving it from the word "jaque"[35] (hence our modern jacket), the surcoat worn over the armour in mediæval days. This, we have seen, had the Cross of St. George always represented on it; but there is no proof that the jaque was ever worn with the union of the two crosses upon it, so that the derivation breaks down just at the critical point. The present flag came into existence in the reign of King George, but no one ever dreams on this account, or any other, of calling it the Union George. On the death of Charles I., the partnership between England and Scotland was dissolved, and the Union Flag, Fig. 73, therefore, was disestablished, and was only restored in the general Restoration, when the Commonwealth and Protectorate had run their course, and Charles II. ascended the throne of his forefathers.