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Letters between correspondents

C. B. Purvis and Frederick Douglass

These are the 5 indexed letters between C. B. Purvis and Frederick Douglass, with both parties read from the letter itself.

5 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. C. B. Purvis to Hon Fred Douglass · 1886-07-01
  2. C. B. Purvis to Mr Douglass · 1888-03-16
  3. C. B. Purvis to Fred Douglass · 1889-06-30
  4. C B Purvis to Hon Fred Douglass · 1890-10-23
  5. C B Purvis to Frederick Douglass · 1891-06-05
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