Addressees: Gerhardt, Karl
- SLC to Karl Gerhardt, February 1881 · Unknown place · UCCL13510
- SLC to Karl Gerhardt, 25 February–27 February 1881 · Hartford, Conn · UCCL11534 CLaf2
- SLC to Karl and Hattie J. Gerhardt, 25 February–27 February 1881 · Hartford, Conn · UCCL12017 NSyU
- SLC to Karl Gerhardt, 27 February 1881 · Hartford, Conn · UCCL12674 CtHMTH
- SLC to Karl Gerhardt, 3 March 1881 · Hartford, Conn · UCCL08590 MoHM
- SLC to Karl Gerhardt, 4 March 1881 · Hartford, Conn · UCCL12014
- SLC to Karl and Hattie J. Gerhardt, 11–19 April 1881 · Hartford, Conn · UCCL01935 NNWH, ViU
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 9 May 1881 · Hartford, Conn · UCCL01952 MB
- SLC to Karl Gerhardt, 30 May 1881 · Hartford, Conn · UCCL10064 CU-MARK, MB
- SLC to Karl and Hattie J. Gerhardt, 26 June 1881 · Branford, Conn · UCCL01978 TxAu3, NHC
- SLC to Karl and Hattie J. Gerhardt, 31 July 1881 · Branford, Conn · UCCL01991 MB
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 31 August 1881 · Elmira, N.Y · UCCL12693 CtHMTH
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 31 August 1881 · Elmira, N.Y · UCCL02019 CLjC, MB
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 9 October 1881 · Hartford, Conn · UCCL02049 MB
- SLC to Karl and Hattie J. Gerhardt, 7 November 1881 · Hartford, Conn · UCCL02083 MB
- SLC to Karl and Hattie J. Gerhardt, 21 November 1881 · Hartford, Conn · UCCL02094 NjNH2
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 24 February 1882 · Hartford, Conn · UCCL02165 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 21 March 1882 · Hartford, Conn · UCCL02177 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 23 March 1882 · Hartford, Conn · UCCL02179 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 1 June 1882 · Hartford, Conn · UCCL02210 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 4 August 1882 · Elmira, N.Y · UCCL02259 NN5, MB
- SLC to Karl Gerhardt, 30 September–1 October 1882 · Hartford, Conn · UCCL02282 MB
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 23 October 1882 · Hartford, Conn · UCCL02565 NN-BGC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 4 December 1882 · Hartford, Conn · UCCL02302 CU-MARK
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 14 January 1883 · Hartford, Conn · UCCL09791 CU-MARK
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 25 January–6 February 1883 · Hartford, Conn · UCCL10134 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 26 March 1883 · Hartford, Conn · UCCL02364 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 1–3 May 1883 · Hartford, Conn · UCCL02380 CU-MARK
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 7 May 1883 · Hartford, Conn · UCCL02379 MiD
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 14–25 June 1883 · Hartford, Conn · UCCL02881 CU-MARK
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 2 July 1883 · Elmira, N.Y · UCCL02300 MB, CPac2
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 20 July 1883 · Elmira, N.Y · UCCL11182 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 1 August 1883 · Elmira, N.Y · UCCL02818 CtHMTH
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 5 March 1884 · Hartford, Conn · UCCL02926 CLjC
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 5 April 1884 · Hartford, Conn · UCCL12036 CtHMTH
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 4 May 1884 · Hartford, Conn · UCCL02969 CtY-BR
- SLC to Karl Gerhardt, 11 September 1884 · Elmira, N.Y · UCCL04135 MiD
- SLC to Karl Gerhardt, 20 September 1884 · New York, N.Y · UCCL01319 CLjC
- SLC to Karl Gerhardt, 21 September 1884 · Elmira, N.Y · UCCL00586 CU-MARK, InFw2
- SLC to Karl Gerhardt, 23 September 1884 · Elmira, N.Y · UCCL11909 CU-MARK
- SLC to Karl Gerhardt, 24 September 1884 · Elmira, N.Y · UCCL00297 CCC
- SLC to Karl Gerhardt, 28 September 1884 · Hartford, Conn · UCCL01443 MiD, MB
- SLC to Karl Gerhardt, 22 November 1884 · New York, N.Y · UCCL03028 CU-MARK
- SLC to Karl Gerhardt, 2 April 1885 · Hartford, Conn · UCCL03199 CU-MARK
- SLC to Karl Gerhardt, 3 April 1885 · Hartford, Conn · UCCL03203 CU-MARK
- SLC to Karl Gerhardt, 10 April 1885 · Philadelphia, Pa · UCCL03211 MB
- SLC to Karl Gerhardt, 28 May 1885 · Hartford, Conn · UCCL12015 CU-MARK
- SLC to Karl Gerhardt, 4 June 1885 · Hartford, Conn · UCCL03236 NHi
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 14 June 1885 · Hartford, Conn · UCCL09074 PP3
- SLC to Karl Gerhardt, 26 June 1885 · Elmira, N.Y · UCCL03246 MB
- SLC to Karl Gerhardt, 28 June 1885 · Elmira, N.Y · UCCL02618 NN-BGC
- SLC to Karl Gerhardt, 5 July 1885 · Elmira, N.Y · UCCL03251 CLjC
- SLC to Karl Gerhardt, 6 July 1885 · Elmira, N.Y · UCCL03253 CtY-BR
- SLC to Karl Gerhardt, 11 July 1885 · Elmira, N.Y · UCCL03258 CtY
- SLC to Karl Gerhardt, 18 July 1885 · Elmira, N.Y · UCCL03260 NHor2
- SLC to Karl Gerhardt, 28 July 1885, Elmira, N.Y · UCCL13977
- SLC to Karl Gerhardt, 5 September 1885 · Elmira, N.Y · UCCL11710 PP, MB
- SLC to Karl Gerhardt, 8 October 1885 · Hartford, Conn · UCCL03293 NN
- SLC, OLC to Karl Gerhardt, 22–23 February 1886 · Hartford, Conn · UCCL03370 MB
- SLC to Karl Gerhardt, 15 July 1886 · Elmira, N.Y · UCCL03420 MB
- SLC to Karl Gerhardt, 21 August 1886 · Unknown place · UCCL04265 MiD
- SLC to Karl Gerhardt, 7 October 1886 · Hartford, Conn · UCCL11541 CLjC
- SLC to Karl Gerhardt, 16 October 1889 · Hartford, Conn · UCCL03952 MB
- SLC to Karl Gerhardt, 2 December 1889 · Hartford, Conn · UCCL09174
- Franklin G. Whitmore for SLC to Karl Gerhardt, 10 February 1890 · Hartford, Conn · UCCL11472 CU-MARK
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