On inclement seasons in the Waswood, certain eddies emerge in the brackish water. The willows, dipped weeping in the stream, part and allow for new passages to form in the forest. Or, perhaps more accurately, old ones.

The Waswood is riven in twain! Players with access to the Waswood in Parabola may now re-experience the earth-shaking events of the Great Sink, recreated in the lands of dream. Delve beneath London at Mr Chimes' behest; discover strange treasures; disturb ancient powers; help the Masters save a memory of the London-that-was.

The Sacroboscan Calendar rotates through a different past event every week, looping back around once each event has been shown. Some events – such as the Grand Clearing Out – allow you to gain some items or qualities that were previously retired, if you do not already have them. The calendar is otherwise not a profitable venture, but a slow, low-pressure tour through the past.

To mark the occasion, the Waswood has interrupted its schedule to present the Grand Clearing Out early – it is happening now, and will run from the 13th to the 20th of October. After this, the Waswood will resume its normal course with a memory of the Election of 1897. The Grand Clearing Out will then recur regularly at the end of each cycle, following after the Opening of Arbor.