- Bookplate on first free endpaper; some sl. occas. foxing. Backstrip trifle sunned. A fine copy. = Van Vliet p.202, no.1.

Idem. Langs lijnen van geleidelijkheid. The same work, same edition, 2 vols., orig. yellow wr. w. dec. in black and brown, together in custom-made slipcase.

- Both w. bookplate on htitle; some occas. foxing. Backstrips and frontwr. of vol.1 sl. browned; backwr. vol.1 sl. stained; both vols. w. sm imperfections in margin. Good copy.

= Van Vliet p.205, no.2. Very rare.

AND 3 other copies of the same work, same edition, all 2 parts in 1 vols.: (1) orig. brown publisher's cl. w. dec. in black (identical to the dec. of Van oude menschen) (Van Vliet p.204, no.4); (2) later orig. brown publisher's cl. w. dec. in black (lacks first free endpaper); (3) private giltlettered burgundy cloth.