(Correspondence regarding Undercutting)

1962 June 1 from C.R. Neil to S.J. Shale, Subject: Memorandum of Discussion Concerning Union Objections Cornwall, Concentrator, Grace Mine 1962 June 12 from R.M. Wheeler to S.J. Shale, Subject: Description of Current Undercutting Methods Now Evolving in the Underground Operations (two copies of letter) 1962 November 7 from John V. Beall (New York) to R.M. Wheeler (Cornwall) RE: Request for a copy of paper presented at Lehigh Valley Section of AIME (see SC MS 0140.01.03.05) 1962 November 15 from S.J. Shale to A.F. Peterson, Subject: Report Clearance 1962 November 30 from Edward P. Leach to S.J. Shale, Subject: Report Clearance 1963 February 20 from Robert M. Wheeler to John V. Beall (New York) (RE: paper Presented at Lehigh Valley section of AIME 1963 March 12 from John V. Beall (New York) to Robert M. Wheeler (RE: revised Manuscript depends of National Safety Congress in October) 1963 September 11 from R.T. Renfrew to J. Bernhardt, Subject: Development Comparison – Undercutting Methods 1963 October 15 from J. Bernhardt to P.B. Entrekin, Subject: Undercutting at Cornwall 1963 October 31 from S.J. Shale to J. Bernhardt, Subject: Underground Mining Paper – R.M. Wheeler (three attachments from J. Bernhardt and M.D. Post) 1963 November 6 from J. Bernhardt to P.B. Entrekin, Subject: Underground mining Paper – R.M. Wheeler