A sample of sperm from a person undergoing chemotherapy, which a hospital stored in case he became infertile after the treatment, was that person’s property and its loss or damage was capable of establishing a claim in negligence. Further, where the hospital’s storage was undertaken gratuitously in the sense that it was a bailee of the sperm, any breach of duty in its safe storage causing loss or damage entitled the owner to recover damages in bailment for psychiatric injury and/or mental distress.