The exchange of information which took place was most beneficial, as was the experience which the admirals gained of modern naval warfare.

Moreover, the utterly baseless suggestion which had, unfortunately, found expression in some organs of the Press of the United States that we were not giving the fullest information to the Navy Department was completely disproved.
When Admiral Mayo arrived in England he informed me that the main objects of his visit as Commander-in-Chief of the Atlantic Fleet were: (1) To ascertain our present policy and plans.
(2) To inquire as to the changes, if any, that were contemplated in the immediate or more distant future.
(3) To ascertain what further assistance it was desired that the United States should provide from resources then available or likely to be soon available, and the measures that the United States should take to provide future forces and material.
Papers were prepared under my direction for Admiral Mayo giving full information of our immediate needs, of past procedure and of future plans.

As to our needs, the main requests were: (1) An increase in the number of destroyers, in order to enlarge the convoy system and to provide better protection for each convoy.

An additional 55 destroyers were stated to be required for this service.
(2) An increase in the number of convoy cruisers for the same reason.
The total addition of cruisers or old battleships was given as 41.
(3) An increase in the number of patrol craft, tugs, etc., for anti-submarine work.
(4) The rapid building of merchant ships.
(5) The supply of a large number of mines for the proposed barrage in the North Sea, and assistance towards laying them by the provision of United States minelaying vessels.
(6) Aircraft assistance in the shape of three large seaplane stations on the coast of Ireland, with some 36 machines at each station.
(7) The provision of four coal-burning battleships of the "Dreadnought" type to replace Grand Fleet "Dreadnought" battleships which it was desired to use for other purposes.
Admiral Mayo was informed that some 100,000 mines would be required from the Americans for forming and maintaining that portion of the North Sea Barrage which it was suggested should be laid by them, in addition to the large number that it was proposed that we ourselves should lay in the barrage, and that as the barrage would need patrolling by a large number of small craft, great help would be afforded if the United States could provide some of these vessels.

It was estimated at that time that the barrage would absorb the services of some 250 small vessels in order that a sufficient number might be kept constantly on patrol.
It may be of interest to give the history of the North Sea Barrage so far as I can recollect it.