Pliny Dolphin Part 2

crescit audacia experimento = Confidence grows through experience.

maxime puer, qui primus expertus est, adnatat natanti, insilit tergo, fertur referturque, = Especially the boy who was the first to try it swims up to the swimming dolphin, jumps onto its back, and is carried to and from

agnosci se, amari putat, amat ipse = He thinks he is recognised and loved; he loves in return.

neuter timet, neuter timetur ; = Neither is afraid, and neither is feared.

huius fiducia, mansuetudo illius augetur = The boy's confidence and the dolphin's gentleness both grow

nec non alii pueri dextra laevaque simul eunt hortantes monentesque = Other boys also go alongside, on the right and left, encouraging and advising him.

ibat una (id quoque mirum) delphinus alius tantum spectator et comes = Another dolphin also went along (that too was amazing), only as a watcher and companion.