Imagine you handle the money for a small business in a cash-based economy whose largest denomination bill is worth about nine bucks; what might your desk look like come deposit day?

For a sense of proportion, that pen has a thickness of 16 inches.

As an aside, the odor of Rwandan francs--which often spend part of their lives crumpled in the sweaty pockets of moto drivers--will scent my memories long after I leave.