After Roebling's death in 1869 from an accident, his sons completed the construction of the Brooklyn Bridge in 1883 and continued to expand the family company. The iconic bridge over the East River connecting Brooklyn to Manhattan symbolized an engineering feat in suspension bridge construction as well as New York City itself. This example of the emblematic invoice to be paid in cash by the "N. Y....[Signal] Co." indicates their purchase of "50 ft. 3/8 ' Dia. [?] Strand @ 2.00/100 ft...." less 30% for a total cost of $70. The invoice is noted as "Paid." Condition: Expected sunning, glue traces on upper margin on verso weakening paper in the name Roebling and causing a break that is not immediately visible. The price reflects this imperfection. The invoice measures 8 1/2 x 7 1/2.