The learned works of three of which Readers, namely of Alonso de Chaves, of Hieronymus de Chaves, and of Roderigo Zamorano, came long ago very happily to my hands, together with the straight and severe examining of all such Masters as desire to take charge for the West Indies.' Since therefore De Chaves was an official lecturer to the Contractation House, the Admiralty of the Indies, we may take it that he speaks with full authority of the current naval thought of the time.

That he represented a somewhat advanced school seems clear from the pains he takes in his treatise to defend his opinions against the old idea which still prevailed, that only galleys and oared craft could be marshalled in regular order.

'Some may say,' he writes, 'that at sea it is not possible to order ships and tactics in this way, nor to arrange beforehand so nicely for coming to the attack or bringing succour just when wanted, and that therefore there is no need to labour an order of battle since order cannot be kept.

To such I answer that the same objection binds the enemy, and that with equal arms he who has taken up the best formation and order will be victor, because it is not possible so to break up an order with wind and sea as that he who is more without order shall not be worse broken up and the sooner defeated.

For ships at sea are as war-horses on land, since admitting they are not very nimble at turning at any pace, nevertheless a regular formation increases their power.