It is believed to have originated in England and was first discovered by schoolmaster John Stair in the garden of a Mr. Williams in the early 18th century. The pear is named after him.Here are some key characteristics and descriptions of the Williams Bon Chretien pear fruit:

1. Shape and Size: The Williams pear is medium to large in size, typically measuring around 3 to 4 inches in height. It has a classic pear shape with a slightly rounded bottom that tapers towards the stem end.
2. Skin: When fully ripe, the skin of the Williams pear is smooth and thin, usually turning from green to a vibrant yellow or light green colour. Some specimens may have small russeting (brownish patches) near the stem.
3. Flesh: The flesh of the Williams pear is juicy, tender, and creamy-white in colour. It has a sweet and aromatic flavour with a delicate hint of citrus. The texture is soft, melting, and smooth, making it a popular choice for eating fresh.
4. Ripening: Williams pears are usually harvested when they are still firm and green. They continue to ripen after picking, and as they do, their skin changes colour and softens. It's important to handle them with care to avoid bruising during this ripening process.
5. Availability: Williams Bon Chretien pears are typically available in late summer to early autumn, depending on the region and climate.
6. Culinary Uses: This pear variety is extremely versatile and can be enjoyed in various culinary preparations. It's commonly eaten fresh as a snack or dessert due to its sweet and juicy nature. Additionally, Williams pears can be used in salads, baked goods, preserves, and even used for making pear cider or brandy.
7. Nutritional Value: Like most pears, Williams Bon Chretien pears are a good source of dietary fiber, vitamin C, and various antioxidants. They are low in calories and fat, making them a healthy choice for a balanced diet.