The boxes appear to have been well organized; in addition to the clothes, there is a box of weaponry, all fairly common - things like daggers and shortswords, mostly, and nothing more interesting than a crossbow.
The third holds gear and equipment; ropes and lanterns are in abundance, as are locks. It seems to be the sort of things that might come in handy on the road, rather than exploring uncharted lands or delving into a dungeon.
The fourth contains a rudimentary collection of art. Some of it is obviously worth very little; crude iron medallions, and the like. However, there are some items that may fetch a price. In particular, there's a silver ring set with topaz, a beautiful porcelain swan crafted to scale, and a painting of a ship setting sail into a stormy sea; the scene is just after sunset, or just before sunrise, with just a hint of orange on the horizon. The perspective is from the top of a grassy cliff that takes up roughly the bottom third of the painting, and if you look closely, you can actually see the lights on the ship flicker, and the sea-spray around her hull dance back and forth.

The most interesting box, however, contains only a few items. Two alchemists fires, and a vial of acid are the items you can immediately recognize. There are also three delicately crafted and engraved arrows, a pin made in the shape of a pair of wings, with an emerald set between them, and another, small vial of liquid you cannot identify.