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Letters between correspondents

Helen Pitts Douglass and John C. Yorston & Co

These are the 18 indexed letters between Helen Pitts Douglass and John C. Yorston & Co, with both parties read from the letter itself.

18 entries; every one listed below. Several letters may link to the same folder.

Listed in the derivation’s order: year, then letter ID; undated letters first. Not chronological within a year.

  1. John C. Yorston & Co to Mrs. Helen Douglass · 1895-04-30
  2. John C. Yorston & Co to Mrs. Helen Douglass · 1895-09-17
  3. John C. Yorston & Co to Mrs. Helen Douglass · 1895-12-28
  4. John C. Yorston & Co to Mrs. Helen Douglass · 1895-12-30
  5. John C. Yorston & Co to Mrs. Helen Douglass · 1895-12-31
  6. John C. Yorston & Co to Mrs. Helen Douglass · 1895-05-07
  7. John C. Yorston & Co to Mrs Helen Douglass · 1897-04-28
  8. John C. Yorston & Co to Mrs Helen Douglass · 1897-05-01
  9. John C Yorston & Co to Mrs. Helen Douglass · 1897-06-03
  10. John C. Yorston & Co to Mrs Helen Douglass · 1897-06-04
  11. John C. Yorston & Co to Mrs Helen Douglass · 1897-06-18
  12. John C. Yorston & Co to Mrs. Helen Douglass · 1897-06-19
  13. John C. Yorston & Co. to Mrs Helen Douglas · 1897-06-25
  14. John C. Yorston & Co to Mrs Helen Douglass · 1897-07-21
  15. John C Yorston & Co to Mrs Helen Douglass · 1897-08-27
  16. John C. Yorston & Co. to Mrs Helen Douglass · 1898-04-18
  17. John C. Yorston & Co. to Mrs. Helen Douglas · 1898-05-28
  18. John C. Yorston & Co. to Mrs Helen Douglass · 1898-01-28
How this list was derived

Tier 1: derived from the published letters index, the reviewed correspondent groups and the reviewed place list by the rules below — no inference, no model. Post-fold (sitting 2026-09-05): 169 reviewed correspondent groups; 2090 printed forms remain groups of one below the review floor, disclosed. Corpus version 5db27b8755bd.

Rule: letters carrying both parties (the boundary sentence), grouped by the unordered pair of correspondent groups; see the builder

SELECT id FROM letters WHERE (sender_group = :person_a AND recipient_group = :person_b) OR (sender_group = :person_b AND recipient_group = :person_a) ORDER BY year, id