Things you can learn online about purple cows

Something I found out today about the author of "I Never Saw a Purple Cow":

Number 24 of The Lark (April 1897) was declared to be the last, but a final issue, number 25 entitled The Epi-Lark, was published May 1, 1897.

By this point, Burgess had become thoroughly sick of "The Purple Cow," and wrote the following "Confession: and a Portrait Too, Upon a Background that I Rue" in The Lark, number 24 (April 1, 1897).

Ah, yes, I wrote the "Purple Cow"—

I'm Sorry, now, I wrote it;

But I can tell you Anyhow

I'll Kill you if you Quote it!

So now you know too.