Unpublished letters. John Clipper to Rev. S. S. Cooper. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 70-71.

Míreanna comhchosúla

• Unpublished letters. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 215-220.
  de réir: Butler, T. R., et al.
  Cruthaithe: (1900)
• Unpublished letters. Records of the American Catholic Historical Society of Philadelphia. Volume XI. Pages 351-356.
  de réir: Cooper, Francis.
  Cruthaithe: (1900)
• Unpublished letters. Records of the American Catholic Historical Society of Philadelphia. Volume X. Pages 226-230.
  de réir: De Smet, P. J., et al.
  Cruthaithe: (1899)
• Unpublished letters. Records of the American Catholic Historical Society of Philadelphia. Volume X. Pages 354-362.
  Cruthaithe: (1899)
• Public meeting in the Academy of Music, Philadelphia. Records of the American Catholic Historical Society of Philadelphia. Volume III. Pages 44-71.
  de réir: Gilbert, Joseph I.
  Cruthaithe: (1888)