Bios: THOMAS J. BLACKWOOD, M.D., 20th Century History of New Castle and Lawrence County Pennsylvania and Representative Citizens
  
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      THOMAS J. BLACKWOOD, M.D.,
  
  [p. 721] who has been in the active practice of his profession at New
  Castle for more than thirty years, occupies a very prominent place among
  the medical men of Lawrence County. Dr. Blackwood was born January 13,
  1844, in Slippery Rock Township, Lawrence County, Pennsylvania, and is a
  son of Rev. James and Jemima (Calderwood) Blackwood.
  
  Dr. Blackwood is of Irish extraction, both parents having been born and
  reared in Ireland. His father, Rev. James Blackwood, was educated in his
  native land and was graduated at the great Glasgow University and became
  a minister in the Reformed Presbyterian Church. For many years he lived
  a life of useful effort in Lawrence County, the closing years of which
  were passed at New Castle. His children bore the following names: Martha
  E., Isabella C., Thomas J., William, James, Jane, Robert, Andrew and Jemima.
  
  Thomas J. Blackwood completed his literary training at Beaver Academy,
  at Beaver Falls, Pennsylvania, after which he entered Jefferson Medical
  College at Philadelphia, and was graduated from that grand old
  institution in 1866. He entered into practice in Butler County, but in
  1873 he removed to New Castle, and this city has been the field of his
  professional work ever since. Dr. Blackwood has never ceased being a
  student in his beloved profession, occasionally giving himself the
  benefit of post graduate instruction in great medical centers, and
  keeping in close touch with modern scientific advancement.
  
  Dr. Blackwood was married in 1866, to Sarah J. Magee, who was born in
  Butler County, Pennsylvania, and they have had these children: Mary J.,
  who married James Armstrong; Thomas L., Jemima C., who married Arthur
  Foster; Margaret; and James M. The latter is a graduate of Beaver Falls
  College and of Jefferson Medical College, and he is associated in
  practice with his father.
  
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  20th Century History of New Castle and Lawrence County Pennsylvania and
  Representative Citizens Hon. Aaron L. Hazen Richmond-Arnold Publishing
  Company, Chicago, Ill., 1908
  
  Updated: 10 Dec 2001