Kautilya's Arthashastra 4.4.3

4.4.3

samāhartā janapade siddhatāpasapravrajitacakracaracāraṇakuhakapracchandaka.kārtāntikanaimittikamauhūrtikacikitsakonmattamūkabadhirajaḍa.andhavaidehakakāruśilpikuśīlavaveśaśauṇḍikāpūpika.pākvamāṃsikaudanikavyañjanān praṇidadhyāt //

The Collector-general shall employ spies disguised as persons endowed with supernatural power, persons engaged in penance, ascetics, world trotters (chakra-chara), bards, buffoons, mystics (prachchhandaka), astrologers, prophets foretelling the future, persons capable of reading good or bad time, physicians, lunatics, the dumb, the deaf, idiots, the blind, traders, painters, carpenters, musicians, dancers, vintners, and manufacturers of cakes, flesh and cooked rice, and send them abroad into the country for espionage.