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Letters between correspondents

Park Publishing Co. and Frederick Douglass

These are the 6 indexed letters between Park Publishing Co. and Frederick Douglass, with both parties read from the letter itself.

6 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. Park Publishing Co. to Hon Fredk Douglass · 1881
  2. Park Publishing Co to Hon Fred'k Douglass · 1882-03-24
  3. Park Publishing Co to How Fredrick Douglass · 1882-04-03
  4. Park Publishing Co. to Hon Fredk. Douglass · 1882-07-19
  5. Park Publishing Co. to Hon. Frederick Douglass · 1889-07-19
  6. Park Publishing Co. to Hon. Frederick Douglass · 1891-12-01
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