Gittin 14: When Is Taking Not Acquiring?

The case of appointing a shaliach to deliver the funds to pay back a debt - with a dispute by Rav and Shmuel whether the person can call back the shaliach. Plus, the logical inference of "migo," or "since." Also, the story of R. Sheshet, his consignment cloaks, and R. Yosef bar Chama as the collector of funds. Also, the difference between "taking" and "acquiring." Plus, what happens if something happens to the sender or recipient along the way? A good deal of discretion in these matters was left to the shaliach.