Item types are as follows.
-1=Others
0=Fists
1=Swords
2=Daggers
3=War Axes
4=Maces
5=Greatswords
6=Battleaxes
7=Bows
8=Staff
9=Crossbows
10=Warhammers
11=Shields
12=Alteration Spells
13=Illusion Spells
14=Destruction Spells
15=Conjuration Spells
16=Restoration Spells
17=Scrolls
18=Torches