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Letters between correspondents

Chas. A. Preston and Frederick Douglass

These are the 10 indexed letters between Chas. A. Preston and Frederick Douglass, with both parties read from the letter itself.

10 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. Chas. A. Preston to The Hon. Frederick Douglass · 1892-04-20
  2. Chas. A. Preston to Mr Douglass · 1892-07-22
  3. Chas. A. Preston to The Hon. Frederick Douglass · 1892-07-06
  4. Chas. A. Preston to Mr Douglass · 1892-08-11
  5. Chas. A. Preston to Mr Douglass · 1892-09-19
  6. Chas. A. Preston to Mr Douglass · 1892-10-05
  7. Chas A. Preston to The Hon. Frederick Douglass, Commissioner for Haiti · 1892-12-21
  8. Chas. A Preston to The Honorable Frederick Douglass · 1892-03-19
  9. Chas. A Preston to My dear Mr. Douglass · 1893-02-19
  10. Chas. A. Preston to The Hon. Frederick Douglass · 1893-03-14
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