diff --git a/app/dashboards/letter_dashboard.rb b/app/dashboards/letter_dashboard.rb
index 7abfece..ae35982 100644
--- a/app/dashboards/letter_dashboard.rb
+++ b/app/dashboards/letter_dashboard.rb
@@ -46,7 +46,8 @@ class LetterDashboard < Administrate::BaseDashboard
     letter_owner: Field::BelongsTo,
     letter_publisher: Field::BelongsTo,
     created_at: Field::DateTime,
-    updated_at: Field::DateTime
+    updated_at: Field::DateTime,
+    published: Field::Boolean
   }.freeze
 
   # COLLECTION_ATTRIBUTES
diff --git a/spec/requests/admin/letters_spec.rb b/spec/requests/admin/letters_spec.rb
index e6cb6e9..6207590 100644
--- a/spec/requests/admin/letters_spec.rb
+++ b/spec/requests/admin/letters_spec.rb
@@ -3,19 +3,6 @@
 require 'rails_helper'
 
 RSpec.describe 'Admin::Letters' do
-  # LetterDashboard::SHOW_PAGE_ATTRIBUTES includes :published, but ATTRIBUTE_TYPES has
-  # no :published entry. This breaks the show page directly (show.html.erb iterates
-  # SHOW_PAGE_ATTRIBUTES), and also breaks index: Administrate's own
-  # sanitized_order_params helper (called from the custom _collection.html.erb, used
-  # for both index and show) always calls dashboard#item_associations, which
-  # unconditionally reads show_page_attributes regardless of which page is asking.
-  def published_not_in_attribute_types
-    'known bug: LetterDashboard::SHOW_PAGE_ATTRIBUTES includes :published, which has no ' \
-      'entry in ATTRIBUTE_TYPES - raises RuntimeError via Administrate::BaseDashboard#' \
-      'attribute_type_for, reached from show.html.erb directly and from index.html.erb via ' \
-      'sanitized_order_params -> #item_associations (always uses show_page_attributes)'
-  end
-
   describe 'GET index' do
     it 'requires authentication' do
       get admin_letters_path
@@ -23,59 +10,55 @@ def published_not_in_attribute_types
     end
 
     it 'renders successfully when authenticated' do
-      skip(published_not_in_attribute_types)
       create(:letter)
       get admin_letters_path, headers: admin_auth_headers
       expect(response).to have_http_status(:ok)
     end
 
+    # LetterDashboard's index table renders COLLECTION_ATTRIBUTES (date/recipients/
+    # entities) as columns, not the display_resource string - each row's link to
+    # admin_letter_path(letter) is what reliably identifies which letter a row is.
     it 'includes letters within the given start_date/end_date range' do
-      skip(published_not_in_attribute_types)
       in_range = create(:letter, date: DateTime.new(1960, 6, 1), code: 'IN-RANGE')
       get admin_letters_path(start_date: '1960-01-01', end_date: '1960-12-31'), headers: admin_auth_headers
-      expect(response.body).to include("Letter ##{in_range.legacy_pk}")
+      expect(response.body).to include(admin_letter_path(in_range))
     end
 
     it 'excludes dated letters outside the given start_date/end_date range' do
-      skip(published_not_in_attribute_types)
       out_of_range = create(:letter, date: DateTime.new(1900, 1, 1), code: 'OUT-OF-RANGE')
       get admin_letters_path(start_date: '1960-01-01', end_date: '1960-12-31'), headers: admin_auth_headers
-      expect(response.body).not_to include("Letter ##{out_of_range.legacy_pk}")
+      expect(response.body).not_to include(admin_letter_path(out_of_range))
     end
 
     it 'always includes undated letters, regardless of the date range' do
-      skip(published_not_in_attribute_types)
       undated = create(:letter, date: nil, code: 'UNDATED')
       get admin_letters_path(start_date: '1960-01-01', end_date: '1960-12-31'), headers: admin_auth_headers
-      expect(response.body).to include("Letter ##{undated.legacy_pk}")
+      expect(response.body).to include(admin_letter_path(undated))
     end
 
     it 'restores start_date/end_date from the referer when the request omits them' do
-      skip(published_not_in_attribute_types)
       in_range = create(:letter, date: DateTime.new(1960, 6, 1), code: 'IN-RANGE')
       out_of_range = create(:letter, date: DateTime.new(1900, 1, 1), code: 'OUT-OF-RANGE')
       referer = "#{admin_letters_url}?start_date=1960-01-01&end_date=1960-12-31"
 
       get admin_letters_path, headers: admin_auth_headers.merge('HTTP_REFERER' => referer)
 
-      expect(response.body).to include("Letter ##{in_range.legacy_pk}")
-      expect(response.body).not_to include("Letter ##{out_of_range.legacy_pk}")
+      expect(response.body).to include(admin_letter_path(in_range))
+      expect(response.body).not_to include(admin_letter_path(out_of_range))
     end
 
     it 'ignores the referer when it is not an admin/letters URL' do
-      skip(published_not_in_attribute_types)
       out_of_range = create(:letter, date: DateTime.new(1900, 1, 1), code: 'OUT-OF-RANGE')
       referer = "#{admin_entities_url}?start_date=1960-01-01&end_date=1960-12-31"
 
       get admin_letters_path, headers: admin_auth_headers.merge('HTTP_REFERER' => referer)
 
-      expect(response.body).to include("Letter ##{out_of_range.legacy_pk}")
+      expect(response.body).to include(admin_letter_path(out_of_range))
     end
   end
 
   describe 'GET show' do
     it 'renders successfully when authenticated' do
-      skip(published_not_in_attribute_types)
       letter = create(:letter)
       get admin_letter_path(letter), headers: admin_auth_headers
       expect(response).to have_http_status(:ok)