Author
Delaware County Historical Society
6
Maier, Phyllis C.
6
Manton, John C., 1948-
4
Philadelphia Society for the Preservation of Landmarks
4
Delaware Historic Markers Commission
3
Moyer, Nevin Wilberforce, 1876-
3
Pennsylvania Historical and Museum Commission
3
Andrews, Marietta Minnigerode, 1869-1931
2
Arts and Crafts Guild (Philadelphia)
2
Boyer, Charles Shimer, 1869-1936
2
Catholic Church Archdiocese of Philadelphia Catholic Information Center
2
Crompton, Robert D.
2
DePaul, Robert
2
Eberlein, Harold Donaldson
2
Germantown (Philadelphia, Pa.)
2
Glenn, Thomas Allen, 1864-
2
Harrison, Wilmot
2
Historic Fallsington, Inc
2
Hoenstine, Floyd G.
2
Holland Society of New York
2
Hood, Graham
2
Jackson, Joseph, 1867-1946
2
Keyser, Naaman H. 1867-
2
MacElree, Wilmer Worthington, 1859-
2
Paxson, Henry D.
2
Pennsylvania Historical Commission
2
Preston, Howard W. 1859-
2
Reynolds, Helen Wilkinson
2
Shoemaker, Henry Wharton, 1880-
2
Sipe, C. Hale 1880-
2
Snowden, W. H.
2
Virginia Conservation Commission
2
Walton advertising and printing Co., Boston
2
Washington Crossing Park Commission of Pennsylvania
2
Waterman, Thomas Tileston, 1900-
2
Albert M. Greenfield & Co. (Philadelphia)
1
Allis, Marguerite, 1887-1958
1
American Philosophical Society
1
American Scenic and Historic Preservation Society
1
Amory, Thomas C. 1812-1889
1
Angus, William, 1752-1821
1
Archambault, Anna Margaretta
1
Armor, William Crawford
1
Arthur, Stanley Clisby
1
Avery, Alphonse Calhoun, 1835-
1
Ball, Berenice M., 1903-
1
Bank of the Manhattan Co., New York
1
Barrows, John A.
1
Bartlett, Clifford Allan Hereshoff, 1850-
1
Batchelder, Samuel Francis, 1870-1927
1
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