Which cards count as honours in traditional partnership whist?

In traditional partnership whist, the honours consist of the four highest-ranking cards in the trump suit: the ace, king, queen, and jack.1

If a partnership holds three of these cards between them, they score two points; if they hold all four, they score four points. These points are only awarded if they do not result in the partnership reaching the game score, as honours are ignored once the game is won. It is important to note that in many modern variations of the game played in Britain, honours are no longer used in scoring.1