the five headmost ships of their van , tacked , and standing to the south , to windward of the british fleet , were engaged and the stern-most of them taken ; the others went off , leaving to his majesty ; s squadron nineteen ships of the line ( of which two are first rates , the santissima trinidad and the santa anna ) with three flag officers , admiral villeneuve , vice admiral don ignatio maria daliva and the spanish rear admiral , don baltazar hidalgo cisneros .