Just going through that same issue of the White Dwarf Magazine and they are called the Hospitalers rather than Hospitallers. Anways, they are not all togeather in a single quote, but rather dedicated to half a page each. All it says is the color scheme, their name, and who they were created by. Most of the half pages are taken up by a large picture of a small task force models.

Also, in the early pages of the White Dwarf issue, there was also another Chapter by the name of the Helion Legion. They are a Ultramarines Successor Chapter that have been positioned on the outskirts of the Imperium, mainly to fight off the Tyranids.

That's all I have for now but I will try and get the color schemes and page number put up for you.