76/ 59 [Ex libris]. Wetselaar, P. (1923-2001). "Ik ben van Henk van Otterloo". Two diff. designs for H. VAN OTTERLOO's ex libris, pencil, 6,5x10 cm. and Ø 8,5 cm., both under passepartout, signed in pencil on passepartout. - WITH 17 copies of the etched ex libris, printed in various colours, all signed in pencil. Acket, D. (1905-1987). "Ex Libris H. van Otterloo". Woodcut, 8,5x8,5 cm., signed and "Handdruk" in pencil, on thin Japanese. - WITH a small stack of correspondence between D. Acket and H. van Otterloo concerning the ex libris. - AND an autograph letter from JOAN HASSALL to H. van Otterloo, politely turning down a commission for a piece of work (prob. ex libris).