Helen Pitts Douglass and John C. Yorston Jr.
These are the 3 indexed letters between Helen Pitts Douglass and John C. Yorston Jr., with both parties read from the letter itself.
Listed in the derivation’s order: year, then letter ID; undated letters first. Not chronological within a year.
- John C. Yorston Jr. to Mrs. Helen Douglass · 1895-09-26
- John C. Yorston Jr. to Mrs. Helen Douglass · 1895-10-04
- John C. Yorston Jr to Mrs. Helen Douglass · 1897-01-23
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