And the quote Kimloc is referring to is:
Quote
Tayschrenn's thin, almost hairless brows rose. 'A field promotion, wasn't it? Well, perhaps long overdue. Nonetheless, Id o not believe the Empress has sanctioned that title as yet.'
Quick Ben offered him a broad, white smile. 'Do you recall, High Mage, a certain other High Mage, sent by the Emperor, early on the Blackdog Campaign? Kribalah Rule?'
'Rule the Rude? Yes, he died after a month or so-'
'In a horrible conflagration, aye. Well, that was me. Thus, I've been a High Mage before, colleague...'
Tayschrenn was frowning, clearly thinking back, then the frown became a scowl. 'And the Emperor knew this? He must have, having sent you - unless, of course, he didn't send you at all.'
'Well, granted, there were some improprieties involved, and had one set out on that particular trail they might well have been noted. But you did not feel the need to do so, evidently, since, although briefly, I more than held my own - pulling you out of trouble once, I seem to recall... something about Tiste Andii asassin-mages-'
'When I lost a certain object containing a demon lord...'
'You did? Sorry to hear that.'
'The same demon that later died by Rake's sword in Darujhistan.'
page 124-125 BoneHunters