All the quartered Arms that I meet vvith belonging to Scottiſh Families, do not exceed ſix different Coats of Arms, vvhich are marſhalled after theſe three vvays, Plain Quartering, Quartering, and Counter-quartering, of vvhich I have treated and illuſtrate by Examples, vvith their Surtouts and Ineſcutcheons.
Source: wiktionary