E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Lion (grateful for kindness):
ANDROCLUS. (See under LIONas an emblem.)
SIR IWAIN DE GALLES was attended by a lion, which, in gratitude to the knight, who had delivered it from a serpent with which it had been engaged in deadly combat, ever after became his faithful servant, approaching the knight with tears, and rising on his hind-feet like a dog.
SIR GEOFFREY DE LATOUR was aided by a lion against the Saracens; but the faithful brute was drowned in attempting to follow the vessel in which the knight had embarked on his departure from the Holy Land.