It's yellow, of course!

But wait. Soon the pilgrim
Will finish his story--
(It's true)--from Mount Athos.
It tells how that sinner
The Turk had once driven
Some monks in rebellion
Right into the sea,--
Who meekly submitted, 200
And perished in hundreds.

(What murmurs of horror
Arise! Do you notice
The eyes, full of tears?)
And now conies the climax,
The terrible moment,
And even the mother
Has loosened her hold
On the corpulent bobbin,
It rolls to the ground.... 210
And see how cat Vaska
At once becomes active
And pounces upon it.
At times less enthralling
The antics of Vaska
Would meet their deserts;
But now he is patting
And touching the bobbin
And leaping around it