I was today years old when I discovered THE DWINDLEBERRY ZOO by G.E. Farrow (London/Glasgow/Dublin/Bombay: Blackie, 1909) Illustrated by Gordon Browne.  It seems that G.E. Farrow was one of the masters of the Victorian fantasy genre. In this tale a boy eats a berry that reduces him in size, enabling him to have a number of encounters with various animals. The linked version was published in serial form in The Sunday Strand in 1902, and illustrated by Alan Wright.

source [serialized version with illos]