He drops Incantator Robe:
MAGIC ITEM LORE ITEM NO DROP
Slot: Chest
AC: 9
SV FIRE +3 SV COLD +3
WT: 3.5 Size: MEDIUM
Class: Wiz
Race: HUM ERU HIE DEF GNM FRG
Slot 1, Type 7: empty
Reason for killing the gnome is i was farming swirling essence and was bored. I hailed him and he was rude to me for being on his island = dead gnome.