Trials of leading English democrats suspected of spreading the ideas of the French Revolution, 1794.

The treaty between the allies and Germany after the First World War.

In 1802 Richard Trevithick built a steam engine at Penydarren Ironworks, Merthyr Tydfil. In 1804 this was mounted on a carriage with wheels and successfully pulled 5 wagons of iron along the tramroad from Penydarren to Abercynon.

Alliance made in 1405 between Owain Glyndŵr, Edmund Mortimer and the Earl of Northumberland, with the aim of dividing England and Wales between them, involving an extension of the borders of Wales.

See Company Shops.

In 1965 the Tryweryn valley in north Wales was flooded to create a reservoir to provide water for Liverpool. There was strong opposition as it was a Welsh-speaking area and the project involved the drowning of the village of Capel Celyn.

Infectious disease in man and animals. Most common form is pulmonary tuberculosis. Economic conditions have a notable effect on its rate of occurrence, with the working class being most susceptible to the disease. High death rate until effective drug therapy was developed in the 1940s and 1950s.

Organisation of lace or linen makers.

See Toll-Gates.