1961 December 12 from R.M. Wheeler, Subject: MS required to finish undercutting #3 Mine excluding east end 1962 February 14 from D.G. Rogich (Cornwall) to R.T. Renfrew, Subject: Two-WayDrifts 1962 February 14 from R.T. Renfrew (Cornwall) to J. Bernhardt, Subject: Slushing Drift Stations 1962 February 27 from R.T. Renfrew (Cornwall) to J. Bernhardt, Subject: Development Costs – No. 3 Mine 1962 March 16 from R.M. Wheeler to N. Brown (Cornwall) Subject: An Alternate Method for Developing the Remainder of No. 3 Mine (two copies of memo) 1963 July 29 from R.M. Wheeler (Cornwall) to J. Bernhardt (Cornwall) Subject: A Proposal for Increasing Underground Production Efficiency 1963 August 2 from J. Bernhardt (Cornwall) to P.B. Entrekin (Bethlehem) Subject:R.M. Wheeler’s Proposal for Increasing Underground Production Efficiency—Cornwall Mines 1963 August 9 from R.J. McDermott to J.S. Ferguson, Subject: R.M. Wheeler’s Proposal for Increasing Underground Production Efficiency Reference: Mr. C.G. Tebelman’s request for comments as to possibility of job classification changes 1963 August 28 from B. E. S. to J.J. O’Connell, Memorandum for Mr. O’Connell 1963 September 9 from F.R. Barnako to R.K. Branscom (refers to proposed changes as outlined by Mr. Wheeler) 1963 September 18 from S.J. Shale (Bethlehem) to J. Bernhardt (Cornwall) Subject:Underground Efficiency J. Bernhardt Memo 8/2/63 1963 September 23 from P.B. Entrekin (Bethlehem) to J. Bernhardt (Cornwall) (Supplementing Mr. Shale’s letter of September 18, 1963 per C.G. Tebelman) 1963 November (Penciled notes on articles in Canadian Mining Journal, Vol. 84, No.11; 1963 December (Penciled notes on articles in Construction Methods, Vol. 45, No. 12) 1965 March 29 from R.M. Wheeler to J. Bernhardt, Subject: Production Efficiency at No. 3 Mine