On the views expressed in the first of the two letters which follow, as also in the writer's British Academy paper on _Neutral Duties_, as translated in the _Marine Rundschau_, see Professor von Martitz of Berlin, in the _Transactions_ of the International Law Association, 1907. The Institut de Droit International has for some years past had under its consideration questions relating to mines, and has arrived at conclusions which will be found in its _Annuaire_, t. xxi. p. 330, t. xxii. p. 344, t xxiii. p. 429, t. xxiv. pp. 286, 301. The topic has also been dealt with in The Hague Convention, No. viii. of 1907, ratified with a reservation, by Great Britain on November 27, 1907. By Art. 1 it is forbidden "(1) to lay unanchored automatic-contact mines, unless they are so constructed as to become harmless one hour at most after he who has laid them has lost control over them; (2) to lay anchored automatic-contact mines which do not become harmless as soon as they have broken loose from their moorings; (3) to employ torpedoes which do not become harmless when they have missed their mark." By Art. 2, (which is, however, not accepted by France or Germany) it is forbidden "to lay automatic-contact mines off the coast and ports of an enemy, with the sole object of intercepting commercial navigation." MINES IN THE OPEN SEA Sir,--The question raised in your columns by Admiral do Horsey with reference to facts as to which we are as yet imperfectly informed, well illustrates the perpetually recurring conflict between belligerent and neutral interests. They are, of course, irreconcilable, and the rights of the respective parties can be defined only by way of compromise. It is beyond doubt that the theoretically absolute right of neutral ships, whether public or private, to pursue their ordinary routes over the high sea in time of war, is limited by the right of the belligerents to fight on those seas a naval battle, the scene of which can be approached by such ships only at their proper risk and peril. In such a case the neutral has ample warning of the danger to which he would be exposed did he not alter his intended course. It would, however, be an entirely different affair if he should find himself implicated in belligerent war risks, of the existence of which it was impossible for him to be informed, while pursuing his lawful business in waters over which no nation pretends to exercise jurisdiction.