The events take place in 1744 or 1745. The child that Louise de Rohen had with Charles Stuart was not born until 1748.
At Jamie and Claire's dinner party, Louise asks if anyone has attended Lully's opera Acis et Galatée. This work would have been considered ludicrously out-of-date in the 1740s, as it was first performed in 1686. Lully died in 1687.