the invisible helmet.

The good-natured Nymphs had the helmet, with its dark tuft of waving
plumes, all in readiness to put upon his head. And now there happened
about as wonderful an incident as anything that I have yet told you.
The instant before the helmet was put on, there stood Perseus, a
beautiful young man, with golden ringlets and rosy cheeks, the crooked
sword by his side, and the brightly polished shield upon his arm,--a
figure that seemed all made up of courage, sprightliness, and glorious
light. But when the helmet had descended over his white brow, there was
no longer any Perseus to be seen! Nothing but empty air! Even the
helmet, that covered him with its invisibility, had vanished!

"Where are you, Perseus?" asked Quicksilver.

"Why, here, to be sure!" answered Perseus, very quietly, although his
voice seemed to come out of the transparent atmosphere. "Just where I
was a moment ago. Don't you see me?"

"No, indeed!" answered his friend. "You are hidden under the helmet.
But, if I cannot see you, neither can the Gorgons. Follow me,
therefore, and we will try your dexterity in using the winged slippers."

With these words, Quicksilver's cap spread its wings, as if his head
were about to fly away from his shoulders; but his whole figure rose
lightly into the air, and Perseus followed. By the time they had
ascended a few hundred feet, the young man began to feel what a
delightful thing it was to leave the dull earth so far beneath him, and
to be able to flit about like a bird.