▁broke ▁out ▁in ▁their ▁offices . ▁As ▁a ▁result , ▁a ▁new ▁estate ▁office ▁was ▁provided ▁and ▁staff ▁moved ▁to ▁offices ▁at ▁ 1 ▁C ock sp ur ▁Street . ▁A ▁limited ▁company ▁was ▁created ▁with ▁George ▁Ham pton ▁as ▁Chair man ▁and ▁Man aging ▁Director . ▁In ▁ 1 9 0 0 ▁a ▁satellite ▁office ▁was ▁opened ▁on ▁W im ble don ▁Common . ▁As ▁the ▁firm ▁continued ▁to ▁expand ▁it ▁took ▁over ▁control ▁of ▁a ▁number ▁of ▁other ▁fir ms , ▁beginning ▁with ▁James ▁C oul son ▁and ▁Co ▁of ▁Lis burn , ▁Northern ▁Ireland ▁in ▁ 1 8 9 8 , ▁and ▁in ▁the ▁early ▁ 1 9 5 0 s ▁Good all , ▁Lamb ▁and ▁Highway ▁of ▁King ▁Street , ▁Manchester ▁and ▁Rob son ▁and ▁S ons ▁Ltd ▁of ▁New castle ▁upon ▁Ty ne . ▁ ▁In ▁ 1 9 2 0 , ▁Ham pton ▁& ▁S ons ', ▁Est ate ▁Ag ents ▁& ▁Au ction e ers , ▁moved ▁to ▁ 2 0 ▁St ▁James ' s ▁Square , ▁London ▁W . 1 . ▁During ▁the ▁ 1 9 2 0 s , ▁the ▁successful ▁au ction ▁house ▁arm ▁was ▁involved ▁in ▁the ▁sale ▁of , ▁amongst ▁other ▁things , ▁the ▁Michel ham ▁Collection ▁in ▁ 1 9 2 6 ▁( when ▁the ▁record ▁au ction ▁price ▁of ▁ 7 4 , 0 0 0 ▁gu ine as ▁was ▁achieved ▁for ▁the ▁painting ▁' P ink ie ' ▁by ▁Sir ▁Thomas ▁Lawrence ) ▁and ▁the ▁Cam ero on