As requested - a graph of the history: <a rel="nofollow" class="external free" href="https://www.reddit.com/r/fallenlondon/comments/1b1cewv/runoff_of_preparations_for_a_vast_revel_current/">https://www.reddit.com/r/fallenlondon/comments/1b1cewv/runoff_of_preparations_for_a_vast_revel_current/</a>

It's pretty much linear the entire time, and the current expected end date using a simple linear regression is 21 Jul 1899 (2024). Five months to go.