Wiktionary
watchfull
a. (obsolete spelling of watchful English)
Usage examples of "watchfull".
He that would discern the rudimentall stroak of a plant, may behold it in the originall of Duckweed, at the bignesse of a pins point, from convenient water in glasses, wherein a watchfull eye may also discover the puncticular Originals of Periwincles and Gnats.