It's been a couple weeks of Iroquoian linguistics:
* Marianne Mithun's "Stalking the Susquehannocks"
* The Lord's Prayer in Shavannice (ca. 1707)
* van den Bogaert's vocabulary of Mohawk
* Couq's "Principes de Grammaire Iroquoise"
I'm trying to see if there's any evidence of an Iroquoian-based trader jargon. So far, not really.