Lady Cadogan gives each suit two finishing routes: one ordinary ace-to-king foundation and one home for an entire completed king-to-ace run. Both decks must finish there.
Complete runs and individual cards use different homes
Build tableau columns down by rank, regardless of suit. Only descending suited runs can move together. Empty columns accept kings or king-led runs. The four ace foundations build upward by suit; the other four homes accept whole completed suited runs, not individual cards.
Decide which copy serves which route
Ten columns begin with 55 cards, including 45 hidden cards. The remaining 49 draw one at a time with no redeal. Sending every accessible low card to the ace homes can interrupt a developing complete run. Check the duplicate’s location before deciding which copy to send home.