Sir Ewen wrote:A change in the arms should reflect some real change in the family status, no?
Yes, though he might have just been donning the surcoat as a shot across someone's bow, rather than an actual change of arms. Other than the Earl or maybe Sir Rohn, it's hard to imagine anyone calling him on it.
Sir Ewen wrote:What if, just supposing, Caldeth has decided (does he have the authority?) to strip Bastune of his barony and grant Kolorn to his soon-to-be son-in-law?
Yes, the Earl can, but it would require the King to confirm since Kolorn is a titled nobleman. It should be noted that dispossessing a baron is a huge, huge deal.
Sir Ewen wrote:If that were to occur, would Karsin the Younger then likely quarter his new barony in 2 and 3, leaving his birthright barony in 1 and 4?
That would depend. Only at the royal level do arms accrue to the title. Below that, they are to the individual. Hence, should Greon Bastune be stripped of his barony, he is still a knight, and would carry his present arms as Sir Greon. It might be that Karsin would want to add an additional achievement to denote his new baronial status (his father still quick), and differentiate himself from Uldien. It would eventually make him the only holder of two baronies in Kaldor.
Sir Ewen wrote:Could his surcoat denote a promise from the Earl, which is incomplete until the King confirms the grant (and presumably Bastune's forfeiture)?
Possibly.
Sir Ewen wrote:On a similar theme though, it is noted that a husband can marshal his arms with those of his wife if she is an heir. Seems like Sir Ewen ought to do this, in defiance of the Earl's bluster about disinheritance. Can this be done without Vemion's permission, just on the strength of Ewen's marriage to Thilisa?
Yes, though it would need Sir Rohn's cooperation. The arms of Vemion would be quartered 1 and 4 with Ravinargh in 2 and 3. Thilisa's arms would remain Vemion, with the three point label of the heir. Also, if I were Sir Rohn, I would charge the full freight for a new achievement - £20.