A position like that of the English fleet, threatened with an attack from two quarters, presents one of the subtlest temptations to a commander. The impulse is very strong to meet both by dividing his own numbers as Charles did; but unless in possession of overwhelming force it is an error, exposing both divisions to be beaten separately, which, as we are about to see, actually happened in this case. The result of the first two days was disastrous to the larger English division under Monk, which was then obliged to retreat toward Rupert; and probably the opportune return of the latter alone saved the English fleet from a very serious loss, or at the least from being shut up in their own ports. A hundred and forty years later, in the exciting game of strategy that was played in the Bay of Biscay before Trafalgar, the English admiral Cornwallis made precisely the same blunder, dividing his fleet into two equal parts out of supporting distance, which Napoleon at the time characterized as a glaring piece of stupidity. The lesson is the same in all ages. [Illustration: Pl. I.] The Dutch had sailed for the English coast with a fair easterly wind, but it changed later to southwest with thick weather, and freshened, so that De Ruyter, to avoid being driven too far, came to anchor between Dunkirk and the Downs.[27] The fleet then rode with its head to the south-southwest and the van on the right; while Tromp, who commanded the rear division in the natural order, was on the left. For some cause this left was most to windward, the centre squadron under Ruyter being to leeward, and the right, or van, to leeward again of the centre.[28] This was the position of the Dutch fleet at daylight of June 11, 1666; and although not expressly so stated, it is likely, from the whole tenor of the narratives, that it was not in good order.