Our model for the currency of small scalene triangles is shown in Figure 7. This contains dates from eleven sites, but only the Howick hut has more than three measurements. This component is defined by Bayliss *et al*. (2007b, fig. 6.2).

This model suggests that small scalene triangles first appeared in *8315–7765 cal BC (95% probability; start scalene triangles;* Figure 7), probably in *8045–7795 cal BC (68% probability)*. Our estimated date for the end of the use of scalene triangles has been arbitrarily defined so is not archaeologically meaningful.

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