Tracy's Gall-stones

Here is a photo of Tracy holding a jar of her gall-stones. She had an operation to remove them ten years ago and keeps them in her bedside drawer. She didn't need to be asked twice to bring them into work as soon as the subject arose

Everything about Tracy is large: her personality, her heart, her voice box, the size of mug she drinks her coffee from, her jacket... so it is somewhat surprising that her gall-stones are so small. I was expecting them to be the size of walnuts.

I've been trying to convince her that she should eat them just to see if they reappear as gall-stones in her system but she is unwilling to participate in a most interesting scientific experiment. Spoilsport!