Source:Ordinance-1916-137
From Pittsburgh Streets
"An ordinance granting to Henry C. Frick, his heirs and assigns, the right to construct and maintain permanently an additional enclosed bridge or passageway over and crossing Relief way, connecting the Frick Building Annex with the Carnegie Building." Pittsburgh city ordinance, 1916, no. 137. Passed Apr. 10, 1916; approved Apr. 14, 1916. Ordinance Book 27, p. 473. In Municipal Record: Minutes of the Proceedings of the Council of the City of Pittsburgh for the Year 1916, appendix, p. 64, Eureka Printing Company, Pittsburgh (Internet Archive Pghmunicipalrecord1916).
