No Englishman, so far as the writer is aware, is better fitted than Mr Thursfield to undertake this task, and this little book is a very excellent example of the way in which that task should be fulfilled. It unites--very necessarily--a high degree of condensation with a simplicity of language and a lucidity of exposition both alike admirable. And Mr Thursfield's right to be heard on naval questions is second to that of no civilian in these islands. His relations with the British Navy have been for more than a quarter of a century of the closest kind. His reputation in the particular field of literary endeavour which he has made his own ranks high amongst writers as celebrated as Admiral Mahan, Sir George Sydenham Clarke (Lord Sydenham), the late Sir John Colomb, and his brother the late Admiral P.H. Colomb, Sir J.K. Laughton, Admiral Sir Cyprian Bridge, Admiral Sir R.N. Custance, Mr Julian Corbett, Mr David Hannay, Mr Archibald Hurd, and others. In the domain of naval history, its philosophy and its literature, he has done brilliant work. When it is added that Mr Thursfield is known to have been, for many years, one of the chief naval advisers of _The Times_, enough will probably have been said to ensure a sympathetic attention for this the veteran author's latest publication. C.L. OTTLEY _24th July 1913_ PREFACE Intelligent readers of this little Manual will perceive at once that it pretends to be nothing more than an introduction, quite elementary in character, to the study of naval warfare, its history, and its principles as displayed in its history. As such, I trust it may be found useful by those of my countrymen who desire to approach the naval problems which are constantly being brought to their notice and consideration with sound judgment and an intelligent grasp of the principles involved in their solution. It is the result of much study and of a sustained intimacy with the sea service, both afloat and ashore, such as few civilians have been privileged to enjoy in greater measure. Even so, I should have thought it right, as a civilian, to offer some apology for undertaking to deal with so highly technical and professional a subject, were I not happily relieved of that obligation by the kindness of my friend Rear-Admiral Sir Charles L. Ottley, who has, at the instance of the Editors of this series, contributed to this volume an Introduction in which my qualifications are set forth with an appreciation which I cannot but regard as far too flattering. It would ill become me to add a single word--unless it were of deprecation--to credentials expounded on such high authority.