Mage's gloves can be found on a skeleton next to a dead Kaedweni soldier and a pool of water, in the ravine directly east of the ruined wagon and south of the stream running past the Kaedweni camp. Head to the left of ravine that is directly infront of you from the wagon heading due East. There will be a clearing on your right to head down into the ravine then jump down. Note that you have to fight an Arachas that spawns when you get close to the soldier's corpse.