Delaware's oldest rowhouse block suggests the ambitious, urbanistic pretensions of early-nineteenth-century New Castle. It was built on speculation by merchant Harlan Cloud of Pennsylvania, who was recalling Philadelphia. Five tenements and a store are lined up in a row, multistory but originally just one room deep, with shared chimneys and winder stairs in a corner. These units changed hands many times before 1850. Cloud's name is recalled today partly because his then-new brick row with stone string course and lintels appeared on the Latrobe-Mills Survey of New Castle of 1805.