The lithomancers also take credit for the formation of the Guilds and the development of the trades. The fact that no lithomancer could actually build anything is something that is ironic in the least. Lithomancers tend towards artistic callings. Some become scientists and physicists. They tend to spend all available time in their studios.
Any free money is spent on vellums, new pencils, etc.
The walls of a lithomancer's apartment will be lined with old blue lines. There will be vellums and yellow trace all over things. Even when just going from place to place, a lithomancer will always have a sketchbook and pencil and will be drawing non-stop. Lithomancy is all about order. If it can be said that one form of magick is in direct opposition to another, then it would be said about chaos and drafting mages.