▁the ▁S lav s ▁made ▁the ▁crossing , ▁the ▁By z antine ▁fleet , ▁standing ▁by ▁inside ▁the ▁Golden ▁Horn , ▁sal lied ▁forth ▁and ▁decis ively ▁defeated ▁them . ▁▁ ▁Following ▁this ▁success ▁and ▁the ▁rep ulsion ▁of ▁the ▁Av ars ▁from ▁the ▁walls , ▁Bon us ▁had ▁to ▁rest rain ▁the ▁over - e ager ▁people ▁of ▁the ▁city , ▁including ▁women ▁and ▁children , ▁who ▁wanted ▁to ▁r ush ▁out ▁and ▁capture ▁the ▁enemy ▁sie ge ▁engines . ▁Instead , ▁on ▁August ▁ 8 , ▁the ▁Av ars ▁began ▁withdraw ing ; ▁Bon us , ▁Patri arch ▁Ser g ius , ▁and ▁many ▁people ▁came ▁to ▁the ▁Golden ▁Gate ▁to ▁watch ▁their ▁retre at ▁and ▁the ▁burning ▁of ▁the ▁sie ge ▁to wers , ▁set ▁on ▁fire ▁by ▁the ▁Av ars ▁themselves . ▁The ▁Emperor ' s ▁brother , ▁The odore , ▁arrived ▁soon ▁after ▁at ▁the ▁head ▁of ▁an ▁army , ▁and ▁took ▁up ▁the ▁running ▁of ▁affairs ▁in ▁the ▁capital . ▁Short ly ▁after ▁this , ▁in ▁early ▁May ▁ 6 2 7 , ▁Bon us ▁died ▁and ▁was ▁buried ▁( on ▁May ▁ 1 1 ) ▁in ▁the ▁Mon aster y ▁of ▁St ▁John ▁of ▁St oud ios . ▁ ▁C is tern ▁of ▁Bon us ▁Bon us ▁also ▁built ▁a ▁large ▁c is tern ▁in ▁the ▁city ▁( G reek : ▁), ▁covered ▁with ▁a ▁dom ed ▁roof , ▁close ▁to ▁the ▁site ▁of ▁his ▁own ▁house . ▁It ▁lay ▁to ▁the ▁n ortheast ▁of ▁the