HORSING AROUND

Today I saw a man about a most enormous horse.
I pulled the silver handle and I launched him on his course.
He galloped through the cisterns and the culverts underground,
And through the darkness found his way, more swift than any hound.
His destination was a pool, all dark and deep and rank,
And when at last he reached it, why, into it he sank.
But do not weep or grieve for my enormous equine, brother -
Just give me but a day or two and I’ll create another.

Post-Scriptum:
Another steed! as massive as the first!
In size and shape much like a liverwurst.