- Most vols. contents fine. Backovers foxed (in various degrees).
= Early prop-up variant. The 6 chromolithogr. parts can be pulled forward to create a three-dimensional effect on the lithogr. plate. Very rare complete series of 6 books published by J. Vlieger. Lust en Leering p.417; one copy in NCC. Not in The Children's World of Learning, cat. Beweegbare Boeken, coll. Caljé-van Gulik and Ki.la.ki.le. SEE ILLUSTRATION PLATE LXXX.