▁the ▁considerable ▁t ribute ▁that ▁they ▁paid ▁to ▁Ven ice ▁until ▁then , ▁but ▁in ▁turn , ▁they ▁gave ▁up ▁the ▁rights ▁to ▁all ▁custom s ▁re venue ▁to ▁the ▁Republic . ▁Ven ice ▁also ▁received ▁further ▁con cess ions , ▁such ▁as ▁the ▁right ▁to ▁reg ulate ▁the ▁weights , ▁measures ▁and ▁scales ▁for ▁all ▁E ub oe a , ▁and ▁privileges ▁for ▁its ▁citizens . ▁So on ▁after , ▁according ▁to ▁the ▁historian ▁Mar ino ▁San udo , ▁William ▁called ▁upon ▁G ug li el mo ▁and ▁N arz otto ▁to ▁present ▁themselves ▁to ▁him . ▁Con stra ined ▁by ▁their ▁fe ud al ▁o ath s ▁of ▁fe alty , ▁they ▁did ▁so ▁and ▁were ▁imprison ed ▁by ▁the ▁Ach ae an ▁prince . ▁The ▁tri arch s ' ▁w ives , ▁accompanied ▁by ▁many ▁kn ights ▁and ▁other ▁k ins men , ▁then ▁went ▁to ▁Marco ▁Gr aden igo , ▁the ▁newly ▁arrived ▁b ail o , ▁and ▁b ese ech ed ▁his ▁aid . ▁" M oved ▁al ike ▁by ▁policy ▁and ▁sympathy ", ▁as ▁the ▁historian ▁William ▁Miller ▁states , ▁Gr aden igo ▁ass ented . ▁ ▁William , ▁moving ▁quickly ▁in ▁support ▁of ▁his ▁own ▁claims , ▁had ▁already ▁seized ▁Neg ro pon te . ▁Gr aden igo ▁and ▁his ▁Ven et ians ▁attacked ▁and ▁took ▁the ▁city , ▁but ▁William ▁respond ed ▁by ▁sending ▁his ▁nep hew ▁the ▁baron ▁of ▁K ary tain a , ▁Geoff roy ▁de ▁Bru y ères , ▁who ▁re capt