Sun Sign: Sagittarius. Mercury In Capricorn. The influence of Mercury in this placing will tend slightly to sober up the exuberance of Sagittarius. There will be increased thoughtfulness and better powers of concentration with less blind optimism, and an element of caution. Interestingly, the wonderful Capricorn offbeat sense of humour will make its mark and chime in quite interestingly with Sagittarian wit. A love of literature is usual.