Operation Red Lantern or False Horizon

Night over steampunk city Ankh-Morpork, viewed from high above; the city sprawls deep below; about 20 glowing red oil lanterns are visible in the city, forming a subtle, intricate irregular network of signals.

No paperwork exists that uses either of these names. Several people use them anyway, which is how one knows it is real.

Messenger routing hacks:

Do Not Press