Patterson Viaduct, Baltimore and Ohio Railroad
1830
1830
1864
circa 1858
1854
1862
1862-09-08
undated
1874
1814-09
1884
1882-09-21
circa 1900
1950-10-03
1921
circa 1867
undated
1889-11
1928
circa 1875-1883
circa 1860-1912
1873
1919
1912-12-20
1913-01-01
1913-01-21
circa 1912
circa 1912
1912-12-21
1912-12-21
1912-12-20
1912-12-20
circa 1912
1913-03-12
1913-03-12
1913-01-09
1913-01-09
1913-01-09
1913-03-12
1913-03-12
1913-03-12
1792
circa 1860-1890
1867-12-14
1953-08
circa 1844-1850
circa 1844-1850
circa 1850
undated
1853-04-05
circa 1860-1869
1910-10-24
circa 1900
circa 1862
undated
circa 1650-1720
1789
circa 1938-1950
1929-11-03
circa 1915
circa 1904