Parents: English variety of unknown parents, found in 1770 by Mr Stair, a teacher, as a chance seedling. Nurseryman Richard Williams later acquired the variety, and started cultivating it under his own name.

Tree: Moderately vigorous with pronounced higher, upright branches. Due to graft incompatibility with quince rootstocks, it is grafted on to seedling rootstocks or interstocks.

Ripening period: It ripens in mid-August.

Fruit: The fruit is medium-sized. The fruit has a classic pear shape, with slightly bumpy surface. The petiole is short and firm. The skin is thin, with a glossy sheen. The main colour of the fruit is light green, which turns into lemony yellow when fully ripe. Sometimes, the cover colour appears on the sunny side in the form of a red blush, which adds to the attractiveness of the fruit. The pulp is yellowish-white, with fine texture and very small stone cells. It is juicy and melting, with a delicate nutmeg aroma.

Other characteristics: Late summer cultivar with excellent characteristics, nowadays used more for processing than for fresh consumption.