The northern boundary of City Point is the south side of Lamberton Street, between Hallock Avenue and Howard Avenue, then the south side of First Street between Howard Avenue and Greenwich Avenue. This can be seen in the 1867 map commissioned by the Hallock family. The Hallock family received approval by the city to begin selling the lots in 1868. You have to scroll down to view the 1867 map: https://citypointnewhavenconnecticut.wordpress.com/historic-maps/ 