[Note: This is an excerpt from a mail concerning a recent addition to the heraldry files. For the arms of House Myre, Lord Rossart, and House Shett, please look at the Heraldry section of the Citadel.]
I think you once said that the Myre arms (ten nooses) had some special significance, but what that is escapes me. Was it commemorating a day ten men were hanged, perhaps?
Something like that, but I haven't fleshed out the story yet.
Similarly, you mentioned that you changed House Stonehouse's arms (which had a torch) because Lord Rossart, the pyromancer Hand of Aerys, took a torch as his personal sigil. We could toss that into the personal arms section. I'm guessing it's something like a hand of some hue holding a torch lit with wildfire, on red or perhaps flame.
I visualized a simple image of a torch, burning with normal fire colors... but I think I like your suggestion better. A pyrcomancer =would= prefer wildfire's jade flame.
Also, looking at the new Vale houses, House Shett is listed as being lords of Gulltown, although we already have House Grafton as that. Some sort of shared control?
Sure, why not. Gulltown is either a very big town or a small city, plenty large enough for two Houses.
We are hoping to differentiate between towns, cities, and castles on the new maps, which has got me thinking about such things. There are five cities in Westeros: King's Landing, Oldtown, Lannisport, Gulltown, and White Harbor. But the first two are much bigger than Lannisport, which is in turn much bigger than the last two.