Does anyone know of a children's book called The Chowry's Tail?

Question

I read this book in about 1974 when I was at Primary School in England, it was already pretty old. It also contained a second story called Idle's Island about kids who get stranded on a mysterious island populated by intelligent model ships. The Chowry's Tail was about the same kids who went off in a gypsy caravan pulled by a Yak. I think. I have searched since the internet began and have not given up yet.

Answer 1

I have found your book! I found it on the database WorldCat.

Chowry and Idle's Islands: two tales of fantasy
Jean Forbes Robertson, illustrated by Charles Stewart
1953
Book 244 p.
London: MacGibbon & Kee

There are only four libraries with this item:

University of Texas, Austin
University of California, Los Angeles
University of Colorado, Boulder
University of Oxford

I also found one site that appears to be selling a copy:

http://www.booksandcollectibles.com.au/bsearch.php3?bsearch_submit=Search&auth=Jean+Forbes-Robertson&title=CHOWRY+%26+IDLE%27S+ISLANDS+TWO+TALES+OF+FANTASY+FOR+BOYS+%26+GIRLS.