149. Onus of proof.

When a chattel entrusted to a custodian is lost, injured or destroyed, the onus of proof1 is on the custodian to show that the injury did not happen in consequence of any neglect on his part, or on the part of his employees acting within the course of their employment2, to use such care and diligence as a prudent or careful man would exercise in relation to the property3. If he succeeds in showing this, he is not bound to show how or when the loss or damage occurred