Add the following to the rule Basic Resources:

The Districts of the city are organised in a circle, except for the Palace which sits at the centre. They are organised such that every District is adjacent to three other Districts: the ones to their clockwise and counter-clockwise, and the Palace itself in the middle. Starting from the northmost district and moving clockwise, the order of the Districts is as follows: the Hill, the Gates, the Fields, the Docks, the Odeon and the Agora.

When a Guardian owns at least two different buildings that are in adjacent Districts they may, as a daily action, select two such buildings and use them to Conduct Trade. The effects of Conducting Trade depend on the chosen buildings in question, as follows:
* Temple-Shop: The Temple buys incense for its rituals. Gain 1 Piety and 1 Money.
* Temple-Farm: The Temple sacrifices a goat. Lose 1 Livestock and gain 3 Piety.
* Temple-House: Believers come to pray. Gain 2 Piety.
* Shop-Farm: The shop augments its range with fresh produce. Gain 1 Money and 1 Livestock.
* Shop-House: Shoppers come to shop. Gain 2 Money.
* Farm-House: Extra workers lead to bumper harvests. Gain 2 Livestock.