From Yorkshire Anthology by Joseph Horsfall Turner (Bingley: Printed for the editor, 1901):

CREEPING JANE.
Peep Green Races, 1820.

COME I'll sing you a song, a very pretty song,
Concerning Creeping Jane,
She ne'er saw a horse in all her life
She valued more than half a pin. Fol de la.

When Creeping Jane came on to the race course,
The gentlemen viewed her all round,
And all they had to say respecting Creeping Jane
Was "she's not able to gallop o'er the ground."

When Creeping Jane came to the first mile post,
Creeping Jane she was left behind,
The rider threw his whip all around her pretty neck
And he said "My little lady never mind."

When Creeping Jane came to the second mile post,
Creeping Jane she's still left behind,
The rider threw his whip around her slender waist,
Said he, "My little lady never mind."

When Creeping Jane came to the third mile post,
Creeping Jane looked brisk and smart,
And then she lifted up her lily white feet.
And passed them all like a dart!

Now Creeping Jane this race she has run,
And scarcely sweats one drop,
And she's able to gallop it over again,
While the others are not able to trot.

Now Creeping Jane is dead and gone,
And her body lies in the cold ground,
I'll go to the master one favour to beg
Her precious little body from the hounds.

From "Old Liversedge," by Frank Peel.

[According to a brief biography of Frank Peel by Charles F. Forshaw, LL.D., included in The Poets of the Spen Valley, edited by Charles Frederick Forshaw (Bradford: Thornton and Pearson, 1892), Frank Peel wrote "Old Liveredge" as a series of articles in The Heckmondwike Herald, May, 1886 to October, 1887, later collected and published as a book, "Spen Valley: Past and Present" (Heckmondwike: Senior and Co., 1893).

[Peep Green is in Hartshead, West Yorkshire.

[Google Books finds around 150 references to "Creeping Jane" in the period 1822 to 1900, most of them in such publications as The Racing Calendar, Sporting Magazine, The Turf Register and Sportsman & Breeder's Stud-Book, Pick's Annual Racing Calendar, etc., starting around 1822. Perhaps the reason the references continue for so many years is that Creeping Jane was being cited as the ancestor of other racehorses. There is a wealth of information there if anyone wants to sift through it—I don't.

[It seems there was also a flower called Creeping Jane.]