By 1621, the Dutch West India Company was organized to manage this new territory and in June 1623, New Netherland became a Dutch province, with headquarters in New Amsterdam. Michael Reyniersz Pauw received a land grant as patroon on the condition that he would establish a settlement of not fewer than fifty persons within four years. He chose the west bank of the North River (Hudson River) and purchased the land from the Lenape. This grant is dated November 22, 1630, and is the earliest known conveyance for what are now Hoboken and Jersey City. Pauw, however, was an absentee landlord who neglected to populate the area and was obliged to sell his holdings back to the Company in 1633. That year, a house was built at Communipaw for Jan Evertsen Bout, superintendent of the colony, which had been named "Pavonia" (the Latinized form of Pauw's name, which means "peacock"). Shortly after, another house was built at Harsimus Cove and became the home of Cornelius Van Vorst, who had succeeded Bout as superintendent, and whose family would become influential in the development of the city. Relations with the Lenape deteriorated, in part because of the colonialist's mismanagement and misunderstanding of the indigenous people, and led to series of raids and reprisals and the virtual destruction of the settlement on the west bank. During Kieft's War, approximately eighty Lenapes were killed by the Dutch in a massacre at Pavonia on the night of February 25, 1643.