Argus’ watch.
She bade him watch the heifer closely, and report anything unusual in its actions. One day, therefore, as he was watching his charge pasture by the river, Argus heard her relate to her father, Inachus, the story of her transformation, and immediately imparted his discovery to Juno, who, advising still closer watchfulness, sent him back to his post.
Jupiter, in the mean while, was in despair; for days had passed without his being able to exchange a word with Io, or deliver her from her imprisonment. Finally he called Mercury to his aid, and bade him devise some plan to rescue her. Armed with a handful of poppies, Mercury approached Argus, and offered to while away the time by telling him tales.
As Mercury was the prince of story-tellers, this offer was not to be despised, and Argus joyfully accepted; but instead of exerting himself to be entertaining, Mercury droned out such lengthy, uninteresting stories, that Argus soon closed half his eyes in profound sleep. Still talking in the same monotonous way, Mercury softly shook the poppies over the giant’s head, until one by one the remaining eyelids closed, and Argus was wrapped in complete slumber.
Then Mercury seized the giant’s sword, and with one well-directed blow severed his head from the huge trunk. Only one half of the task was successfully accomplished; and while Mercury was driving the heifer away, Juno discovered his attempt, and promptly sent an enormous gadfly to torment the poor beast, who, goaded to madness by its cruel stings, fled wildly from one country to another, forded streams, and finally plunged into the sea, since called Ionian. After swimming across it, she took refuge in Egypt, where Jupiter restored her to all her girlish loveliness, and where her son Epaphus was born, to be the first king and the founder of Memphis.
“In coming time that hollow of the sea
Shall bear the name Ionian, and present
A monument of Io’s passage through,
Unto all mortals.”
E. B. Browning.
Juno mourned the loss of her faithful Argus most bitterly, and, gathering up his myriad eyes, scattered them over the tail of her favorite bird, the peacock, to have some memento of her faithful servant ever near her.
“From Argus slain a painted peacock grew,
Fluttering his feathers stain’d with various hue.”
Moschus.
This story also is an allegory. Io personifies the moon, restlessly wandering from place to place; Argus, the heavens, whose starry eyes keep ceaseless watch over the moon’s every movement; Mercury is the rain, whose advent blots out the stars one by one, thus killing Argus, who else was never known to close all his eyes at once.
Mercury’s offices and worship.