Signals composed of four flags are divided into different sections again, according to the form of the uppermost flag employed. If this upper flag be either of the pennants C.D or F, it indicates that the signal is what is called vocabulary. If the upper be the burgee--the letter B of the code--it is a geographical signal; thus, any vessel beating up channel and seeing Fig. 325, made up of B.D.T.F, hoisted from a lighthouse, would, even if uncertain before, know their position, as this signal is the one specially assigned to the Eddystone. Fig. 326, the letters B.D.P.Q, signifies that the vessel flying it hails from the port of London, while B.F.Q.T. is Edinburgh, and so on. All names of ships are expressed by four letters, thus N.V.B.Q is the code signal (Fig. 327) of the steamship _Germanic_; M.N.D.L (Fig. 328) that of the _Hesperus_; and Fig. 329, made up of G.R.C.T, is the special grouping assigned to H.M.S. _Devastation_. All these names are recorded in the Shipping List, so that two vessels passing each other in mid-ocean are able at once to determine each others' names if within sighting distance of the flags run up. Should we see a stately liner coming to port, flying M.T.L.Q, we recognise that it is the _Australia_ of the great Peninsula and Oriental Line, but if she runs up L.H.T.B then she is the Orient Company's boat _Orotava_. Some names occur frequently, thus other _Australias_, belonging to various owners, are distinguished by the code signals R.L.H.V, J.T.G.K, M.P.F.C, M.Q.N.G, M.T.W.D, W.F.T.N, etc., etc. Figs. 355, 356, 357, 358, 359 are all code signals of various _Australias_. While the Peninsular and Oriental Company has also a _Victoria_, K.M.Q.F., they have no monopoly of the name. There are numerous other boats of that popular designation, but even when vessels have the same name no two vessels ever have the same code letters assigned to them. Other _Victorias_, for example, are differentiated, as W.Q.M.N., L.S.H.R, K.P.G.Q, M.K.C.H, M.S.P.B, M.Q.C.J, L.D.F.H, T.R.B.N, K.J.H.P, T.D.R.F, etc., etc. Figs. 350, 351, 352, 353, {138} 354 are all _Victorias_; and Figs. 360, 361, 362, 363, 364 are the flag-signals of various _Britannias_. Our readers will see at once how distinctive they are. Figs. 335 to 349 inclusive are the special flags of well-known steamships of the Peninsular and Oriental, the Orient Line, and the _Compagnie Générale Transatlantique_. Should the vessel be a yacht, it is the _Aline_ if she shows the flags P.W.N.D; the _Star of the Sea_ if her signal is T.N.B.H; but if it is the _Meteor_ we shall be aware of the fact from her hoisting the four flags L.C.T.P. The flag signal of the _Valkyrie_ is L.F.M.G.