 The signals for use under sail by day, made with a combination of 'cornets', which were swallow-tail flags, other flags, and flags from the table, included a series of battle signals.No-one studying this book could criticise the Spanish either for a lack of useful signals for battle and general purposes, or for over elaboration of signalling technique.Although still tied to the tabular system, their arrangement was brilliantly simple compared with that of the French.