Addressees: Natkin, Gertrude
- SLC to Gertrude Natkin, 28 December 1905 · New York, N.Y · UCCL07278 CU-MARK
- SLC to Gertrude Natkin, 1 January 1906 · New York, N.Y · UCCL07296 CU-MARK
- SLC to Gertrude Natkin, 3 February 1906 · New York, N.Y · UCCL07325 CU-MARK
- SLC to Gertrude Natkin, 8 February 1906 · New York, N.Y · UCCL07332 CU-MARK
- SLC to Gertrude Natkin, 14 February 1906 · New York, N.Y · UCCL07342 CU-MARK
- SLC to Gertrude Natkin, 18 February 1906 · Unknown place · UCCL12546 CLjC
- SLC to Gertrude Natkin, 20 February 1906 · New York, N.Y · UCCL07351 CU-MARK
- SLC to Gertrude Natkin, 2 March 1906 · New York, N.Y · UCCL07361 CU-MARK
- SLC to Gertrude Natkin, 4–9 March 1906 · New York, N.Y · UCCL07375 CU-MARK
- SLC per Isabel V. Lyon to Gertrude Natkin, 13 March 1906 · New York, N.Y · UCCL07381 CU-MARK
- SLC to Gertrude Natkin, 16 March 1906 · New York, N.Y · UCCL07389 CU-MARK
- SLC to Gertrude Natkin, 18 March 1906 · New York, N.Y · UCCL07393 CU-MARK
- SLC to Gertrude Natkin, 24 March 1906 · New York, N.Y · UCCL07401 CU-MARK
- Isabel V. Lyon for SLC to Gertrude Natkin, 3 April 1906 · New York, N.Y · UCCL07411 CU-MARK
- SLC to Gertrude Natkin, 8 April 1906 · New York, N.Y · UCCL07421 CU-MARK
- SLC to Gertrude Natkin, 19 April 1906 · New York, N.Y · UCCL07432 CU-MARK
- SLC to Gertrude Natkin, 27 April 1906 · New York, N.Y · UCCL07436 CU-MARK
- SLC to Gertrude Natkin, 10 May 1906 · New York, N.Y · UCCL07439 CU-MARK
- SLC to Gertrude Natkin, 13 May 1906 · New York, N.Y · UCCL10464 CU-MARK
- SLC to Gertrude Natkin, 30 November 1906 · New York, N.Y · UCCL07578 CU-MARK
- SLC to Gertrude Natkin, December 1906 · New York, N.Y · UCCL07585 CU-MARK
- SLC to Gertrude Natkin, Unknown date · Unknown place · UCCL12402
- SLC to Gertrude Natkin, 31 December 1906 · New York, N.Y · UCCL07603 CU-MARK
- SLC to Gertrude Natkin, 31 December 1908 · Redding, Conn · UCCL08193 CU-MARK
- SLC to Gertrude Natkin, Unknown date · Unknown place · UCCL10387
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