From Kindergarten Review, Vol. 14, No. 7 (Springfield, Mass.: Milton Bradley Co., March 1904), page 435:


CATKIN.
By a Child Seven or Eight Years Old.

I had a little pussy,
And her coat was silvery gray;
She lives in a great wide meadow,
And she never runs away.

She always was a pussy.
She never came a cat.
Because—she’s a pussy willow!
Now what do you think of that!