What did Henry Hudson negotiate with his crew and the natives?
http://en.wikipedia.org/wiki/Henry_Hudson
http://www.elizabethan-era.org.uk/henry-hudson.htm
http://www.socialstudiesforkids.com/subjects/henryhudson.htm
Let us know what you think. If you don't find anything, be sure you're clear on what you mean by "negotiate."