Mercury In 9th House For Aries Ascendant
Here, Mercury sits in 9th house in Sagittarius and rules 3rd & 6th houses. Now, native is all into reading scriptures, higher learning and collecting information from whatever sources. They will first gather information and then publish it. They may be an author or a blogger. Native also travels a lot. Their travels are frequent, i.e. they don't stay at one place for long. Tremendous curiosity about philosophy, religion and people of different ethnicities.
Mercury In 9th House For Taurus Ascendant
Here, Mercury sits in 9th house in Capricorn and rules 2nd & 5th houses. It exhibits a lawyer since 9th house is house of law, Capricorn is sign of law and order and Mercury is all about communications. Here they are inquisitive about higher learning and would be leaning to read whatever interests them.