BEIN 2011 +47: In brown wrappers. From the Duval-Mercier Collection of Rodolphe Töpffer.
BEIN 2011 262: Autograph: Etienne Duval. Author's presentation inscription to François Duval. Formerly owned by Kity Töpffer. Ms. list tipped in at front. From the Duval-Mercier Collection of Rodolphe Töpffer. No. 11 of 23 titles bound together.