Meeting History, Again is an achievement that requires the player to return to the past and talk to Sarah about Herblore after Meeting History.
Have nothing equipped and have only the enchanted key in the inventory. From the sheep pen gate (north of Ardougne, east side of the river) walk north to the edge of the fence and then three steps west onto a small patch of flowers. Rub (not feel) the key and go to past B, not past A.
This achievement used to be a task prior to the release of the Achievements System on 18 April2017.