The process is thought by some to have started 7,500 to 12,000 years ago.

The race is thought to have started in the early years of the last century, and may have an even older ancestry.

He is thought to have started work around 1791 with John Avery.

They are thought to have started when pictures were used to tell stories on pots and other artwork.

Construction is thought to have started on the castle in 1300.

The diversions, which were uncovered after her departure, are thought to have started in 1990.

Cultivation in Europe is thought to have started around the last decades of the 17th century.

It is thought to have started hosting live music during the 1940s jazz era.

It is thought to have started in France in the 1770s.

This legal action is thought to have started on 8 May.