This is all I know about these figurines;
Edgar Rice Boroughs E'zine...scroll down about half-way.
But...I'm not even sure that's right, I mean; clearly the figurines go with/are for the toy theatre, but I can find nothing else about 'Fould' without an 's' and the order-form in the link isn't enlargeable to check spelling. As I have squirrelled away all sorts of stuff over the years I know that a company called Foulds & Freure (with an 's') were importers of Japanese and European toys (to America) between the wars, I suspect these (the link's subjects) are them? There's nothing on either name in Garratt.
The figures illustrated above, will be originals. probably from Germany (?), and are about 8 inches high, hollow, slip-cast bisque (or;Parian Porcelain) mouldings in the style of Fairings, which they may well have been issued as over here...there..Europe. Doh!
29th Jan 2015 - Paul 'Stads' Stadinger has sent a link with further information....
Hakes Dot Com
Thanks for that Paul (both Pauls!)., and it's a different Foulds altogether, in fact it's Gem Clay...when it's not Heinz!
"In 1932 the Gem Clay Forming Co. produced a series of Tarzan plaster statues which were offered by various sponsors ........ The insert sheets/sets varied for the different sponsors. One side features images of the 10 numbered statues along w/color chart and offer blank. Opposite side advertises Foulds/Heinz products. The main difference is the statues offered. Most are same from set to set, with a few exceptions. Foulds offers "Three Monkeys" and "Witch Doctor" statues while Heinz offers "Kerchak The Ape" and "French Sailor" statues and sheets have different layouts".