"During a visit at Hilarides in Bolsward, the Uffenbach brothers are presented with an atlas which Hilarides's son had coloured himself. Uffenbach mentions Hilarides's love for geography and his collection of maps. Because his collection of 30 engraved maps from Friesland was incomplete, Hilarides had drawn the missing six himself. Hilarides shows them the Dominium Frisiae map published in Amsterdam by Abraham Allard, which includes a big mistake."