There is a detailed examination of his case at this link
http://www.washingtonhistoryonline.org/leschi/
Ive not read all of it myself but would expect the answer to your question to be there.
Unfortunately the "quashing" of his sentence came far too late to save him from being hung
Answer:
The use of gun powder, and tools.
Explanation:
Answer:
The sale would allow him to finance operations in Europe making France stronger. The sale would assure forever the power of the US. The sale would give England "a rival who sooner or later would humble her pride".