▁Ray ▁and ▁their ▁friends ▁under to ok ▁a ▁number ▁of ▁jour ne ys ▁to ▁gather ▁information ▁and ▁spec im ens , ▁initially ▁in ▁England ▁and ▁Wales , ▁but ▁cul min ating ▁in ▁an ▁extensive ▁tour ▁of ▁contin ental ▁Europe , ▁visit ing ▁museum s , ▁libraries ▁and ▁private ▁collections ▁as ▁well ▁as ▁studying ▁local ▁animals ▁and ▁plants . ▁After ▁their ▁contin ental ▁tour , ▁he ▁and ▁Ray ▁lived ▁and ▁worked ▁mainly ▁at ▁Middle ton ▁Hall . ▁Will ugh by ▁married ▁Emma ▁Bar n ard ▁in ▁ 1 6 6 8 ▁and ▁the ▁couple ▁had ▁three ▁children . ▁ ▁Will ugh by ▁had ▁suffered ▁b outs ▁of ▁ill ness ▁over ▁the ▁years , ▁and ▁eventually ▁died ▁of ▁ple ur isy ▁in ▁July ▁ 1 6 7 2 , ▁aged ▁ 3 6 . ▁His ▁prem ature ▁death ▁meant ▁that ▁it ▁fell ▁to ▁Ray ▁to ▁complete ▁the ▁works ▁on ▁animals ▁they ▁had ▁joint ly ▁planned . ▁In ▁due ▁course , ▁Ray ▁published ▁books ▁on ▁birds , ▁fish ▁and ▁in verte br ates , ▁the ▁Or n ith ologia e ▁Lib ri ▁T res , ▁Historia ▁P is ci um ▁and ▁Historia ▁In se ctor um . ▁The ▁Or n ith ology ▁was ▁also ▁published ▁in ▁an ▁expanded ▁form ▁in ▁English . ▁The ▁books ▁included ▁innov ative ▁and ▁effective ▁ways ▁of ▁class ifying ▁animals , ▁and ▁all ▁three ▁were ▁influ ential ▁in ▁the ▁history ▁of ▁life ▁science , ▁including ▁their ▁effect ▁on ▁subsequent ▁natural ▁history ▁writers ▁and ▁their ▁importance ▁in ▁the ▁development ▁of ▁Lin na eus