Mercury represents communication, Cartesian and logical spirit.
Mercury in Scorpio
Plays on words, argues, criticizes, jokes, is ironical, mocks. He is crafty and always finds a solution to a problem.
Weaknesses: mocks, derides, disputes, constantly picks a quarrel. A really awkward customer.
Mercury in VII
Hates being alone. He has lots of friends, likes to discuss and similarly has a lot of work friends. Likes to write.
617 Conjunction Sun - Mercury
He is intelligent and knows what he wants. Is a good organizer, he likes moving, travel. He likes literature.
174 Trine Moon - Mercury
He has good judgement, a good memory. He is intelligent, imaginative, vivacious and develops all through life. He speaks easily. He has an aptitude for learning foreign languages.
-99 Square Mercury - Jupiter
He is frivolous and imprudent. He lacks judgement, and is full of self-importance. He has difficulty in realizing his plans, because he lacks clarity and rates his qualities higher than they are.
26 Trine Mercury - Uranus
He is perspicacious, ingenious: he binds intelligence and originality together with genius. He likes literature, especially fiction. He is spontaneous in his friendships and knows how to take advantage of the situations that arise.