▁and ▁plants . ▁Given ▁the ▁limitations ▁of ▁time ▁on ▁their ▁demand ing ▁schedule , ▁fish ▁and ▁bird ▁mark ets ▁were ▁a ▁useful ▁source ▁of ▁information ▁and ▁spec im ens . ▁Although ▁all ▁kept ▁journ als , ▁most ▁of ▁Will ugh by ' s ▁are ▁lost , ▁and ▁the ▁journey ▁is ▁mainly ▁documented ▁in ▁Ray ' s ▁Observ ations ▁top ographical , ▁moral ▁& ▁phys i ological ▁made ▁in ▁a ▁journey ▁through ▁part ▁of ▁the ▁Low - Count ries , ▁Germany , ▁Italy ▁and ▁France , ▁which ▁included ▁Will ugh by ' s ▁notes ▁from ▁Spain . ▁ ▁The ▁trav ellers ▁visited ▁Br uss els , ▁the ▁University ▁of ▁Le u ven , ▁Ant werp , ▁Del ft , ▁The ▁H ague ▁and ▁Le iden ' s ▁university ▁and ▁public ▁library . ▁On ▁ 5 ▁June ▁they ▁visited ▁a ▁col ony ▁of ▁c orm or ants , ▁grey ▁her ons ▁and ▁sp oon b ills ▁at ▁Ze ven hu izen , ▁and ▁Will ugh by ▁disse cted ▁a ▁sp oon b ill ▁ch ick ▁obtained ▁there . ▁The ▁party ▁continued ▁north ▁through ▁H aar lem , ▁Amsterdam ▁and ▁U tre cht ▁before ▁heading ▁to ▁Str as bourg , ▁where ▁Will ugh by ▁made ▁a ▁di version ▁to ▁buy ▁a ▁hand written ▁book ▁from ▁its ▁author , ▁Leonard ▁Bald ner . ▁This ▁book ▁was ▁illustrated ▁with ▁paint ings ▁of ▁birds , ▁fish ▁and ▁other ▁animals . ▁ ▁Bald ner ▁was ▁a ▁prosper ous ▁former ▁fish erman , ▁town ▁coun c ill or ▁and ▁self -