Does any one know the rest of this contemporary poem?

Question

Does any one know the rest of this contemporary poem,and who wrote it. ? It goes something like this.

Faster than fairies~~faster than witches~~bridges and houses~~hedges and ditches....................................

Answer 1

... fatter than Kirstie... uglier than Mariah... bad singers amongst us... make me wanna cry-ah.

Answer 2

From a Railway Carriage

by Robert Louis Stevenson

Google it, you'll find it.