George Washington wrote of the period between the Treaty of Paris and the writing of the Constitution that the states were united only by a "rope of sand."Disputes between Maryland and Virginia over navigation on the Potomac River led to a conference of representatives of five states at Annapolis, Maryland, in 1786. One of the delegates, Alexander Hamilton, convinced his colleagues that commerce was too much bound up with other political and economic questions, and that the situation was too serious to be dealt with by so unrepresentative a body.