▁ ▁At ▁the ▁end ▁of ▁ 1 9 1 2 , ▁he ▁returned ▁to ▁Amsterdam ▁where ▁he ▁learned ▁wood ▁car ving ▁in ▁the ▁furn iture ▁company ▁of ▁A . M . ▁St olt z . ▁ ▁After ▁several ▁small ▁jobs , ▁K rop ▁worked ▁with ▁Jo op ▁van ▁L unter en ▁and ▁Anton ▁R ä de cker ▁as ▁an ▁assistant ▁in ▁the ▁studio ▁of ▁Hend rik ▁van ▁den ▁E ij nde , ▁ 1 9 1 3 ▁– ▁ 1 9 1 6 . ▁In ▁ 1 9 1 4 ▁he ▁married ▁M ien ▁S le ef ▁and ▁he ▁moved ▁to ▁Pl antage ▁Mu ider gra cht , ▁where ▁he ▁opened ▁his ▁studio . ▁In ▁ 1 9 1 6 , ▁he ▁became ▁a ▁staff ▁member ▁of ▁the ▁Amsterdam ▁Department ▁of ▁Public ▁Works . ▁ ▁He ▁created ▁two ▁groups ▁of ▁dock work ers ▁in ▁gran ite ▁for ▁a ▁ 1 9 1 6 ▁Public ▁Works ▁project . ▁ ▁His ▁work ▁appears ▁integrated ▁with ▁many ▁civ ic ▁buildings ▁and ▁brid ges ▁of ▁the ▁time . ▁ ▁For ▁instance , ▁he ▁designed ▁exterior ▁figures ▁on ▁the ▁Sche ep va arth uis ▁by ▁Amsterdam ▁School ▁architect s ▁Johan ▁van ▁der ▁Mey , ▁Piet ▁K ram er ▁and ▁Michel ▁de ▁K ler k ▁are ▁his . ▁ ▁After ▁this ▁building , ▁K rop ▁received ▁appointment ▁as ▁city ▁sculpt or . ▁ ▁He ▁was ▁responsible ▁for ▁sculpt ures ▁on ▁many ▁brid ges ▁and ▁houses ▁in ▁Amsterdam . ▁These ▁include ▁the ▁Hend rik ▁Ber lage ▁monument ▁on ▁Vict ory