Baretti: A dictionary of the English and Italian languages
Sésta, s. f. pl. seste,
1. compasses, a pair of compasses.Parlar con le seste, to consider or weigh well what one has to say, to speak in a collected manner. Menar le —, to run full speed;2. the sexte, one of the canonical hours. A —,1. with the compass, according to rule; 2. in time, exactly.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
sesta: a paire of compasses, A sesta, by compasse, by leuell, line and measure. Also in order, in due forme, sutably, according to a mansminde. Looke Dáre sesta.