Senders: Johnson, Robert Underwood
- Robert U. Johnson for Century Magazine to SLC, 9 August 1882 · New York, N.Y. · UCLC41171 CU-MARK
- Robert U. Johnson for Century Magazine to SLC, 16 August 1882 · New York, N.Y. · UCLC41182 CU-MARK
- Robert U. Johnson for Century Magazine to SLC, 29 August 1882 · New York, N.Y. · UCLC41197 CU-MARK
- Robert U. Johnson to SLC, 31 March 1884 · New York, N.Y. · UCLC41957 CSmH
- Robert U. Johnson for Century Magazine to SLC, 2 August 1889 · New York, N.Y. · UCLC44617 CU-MARK
- Robert U. Johnson to SLC, 13 November 1900 · New York, N.Y. · UCLC32990 CU-MARK
- Richard Watson Gilder, Robert U. Johnson and Clarence Buel to SLC, 30 November 1900 · UCLC50428 Me4
- Robert U. Johnson for National Institute of Arts to SLC, 17 May 1905 · New York, N.Y. · UCLC34446 CU-MARK
- Robert U. Johnson to SLC, 9 November 1905 · UCLC34741 CU-MARK
- Robert U. Johnson to SLC, 23 September 1907 · New York, N.Y. · UCLC37259 CU-MARK
- Robert U. Johnson to SLC, 30 December 1909 · New York, N.Y. · UCLC40659 CU-MARK
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