1860 Valentine Map of New York City, by George Hayward, D. T. Valentine, from the Digital Commonwealth - commonwealth 4m90f346s. (<a rel="nofollow" class="external free" href="https://www.digitalcommonwealth.org/search/commonwealth:4m90f346s">https://www.digitalcommonwealth.org/search/commonwealth:4m90f346s</a>)
George Hayward, D. T. Valentine
Digital Commonwealth