Prudence has never been in touch with her inner philatelist.
But idly glancing about while the queue wended its interminable way to the post office counter, she spied displays of new-release stamps.
Apparently, this year marks the centenary of the Australian Tax Office.
This is depicted by a series of stamps showing an earnest, middle-aged man wielding a pencil and a frown, in muted tones of green.
Prudence hopes there will also be scones in the lunch-room to celebrate, but suspects the stamps will be the extent of recognition of a century of rebates and returns.