Infants' Hospital Puzzle
a.k.a. Infants Progress Puzzle
Chad Valley Co. Ltd., Harborne, England, 1920;
made for the Infants Hospital in Vincent Square, London, founded by R. Mond.
(cardboard box, 1/4" thick cardboard tray with 10 pieces, 6.75" x 5+7/8" x 9/16";
instructions on the underside of the box top;
Hordern's book
gives the date and a 28 rectilinear /35 straight-line moves solution;
see also
Dad's Puzzler - Exchange Version / Infants Hospital,
Infants' Hospital - The Magic Line,
A Ward Oin The Infants' Hospital,
Infants' Hospital Jigsaw Puzzle)
Here is a 26 rectilinear moves (32 straight-line moves) solution:
Other Photos Of The Infants Hospital Puzzle
Further Reading
Infants Hospital History,
from: http://ezitis.myzen.co.uk/westminsterchildrens.html
Robert Mond Wikipedia Page,
from: http://en.wikipedia.org/wiki/Robert_Mond