Bava Metzia 42 - April 10, 2 Nissan

What level of shmira is needed for various items? How did people watch money? How did that change over time? Various cases are brought which relate to cases with different issues - tchilato b'pshia v'sofo b'oness, a shomer that gave to a family member to watch and did not tell them it was someone else's item, or a steward that bought an animal without teeth and gave it to a cowherd to watch without informing him that the animal had no teeth and could not eat.