. . "Philadelphia" . . . "Electronic books"@en . . . . "Records and correspondence"@en . "Records and correspondence" . . . . . . "On the railway connections of Philadelphia with the central West letters of Prof. Edward D. Mansfield of Cincinnati, to Job R. Tyson, Esq., LL. D. of Philadelphia" . . . . . "Letters of Prof. Edward D. Mansfield of Cincinnati to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . . "On the railway connections of Philadelphia with the central West letters of Prof. Edward D. Mansfield to Job R. Tyson, Esq., LL.D. of Philadelphia"@en . . . "On the railway connections of Philadelphia with the Central West. Letters of Prof. Edward D. Mansfield ... to Job R. Tyson"@en . . "On the railway connections of Philadelphia with the central West letters of Prof. Edward D. Mansfield of Cincinnati to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . . . "On the railway connections of Philadelphia with the central West : letters of Prof. Edward D. Mansfield of Cincinnati to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . . "On the railway connections of Philadelphia with the central West Letters of Prof. Edward D. Mansfield of Cincinnati to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . . . . "Letters of Prof. Edward D. Mansfield to Job R. Tyson, Esq., LL.D. of Philadelphia"@en . . "On the railway connections of Philadelphia with the central West : letters of Prof. Edward D. Mansfield to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . "On the railway connections of Philadelphia with the central West Letters of Prof. Edward D. Mansfield to Job R. Tyson"@en . . . . . "Letters of Prof. Edward D. Mansfield of Cincinnati, to Job R. Tyson, Esq., LL. D. of Philadelphia" . . . . . "On the railway connections of Philadelphia with the central West letters of Prof. Edward D. Mansfield ... to Job R. Tyson"@en . "Letters of Prof. Edward D. Mansfield to Job R. Tyson, Esq., LL. D. of Philadelphia"@en . "Middle West." . . "Railroads United States." . . "Philadelphia (Pa.)" . . "Ohio Valley" . . "Pennsylvania." . . "Pennsylvania" . "Ohio River Valley" . . "Ohio River Valley." .