The colony of Demerara-Essequibo was created on 13 August 1814 when the British combined the colonies of Demerara

Demerara

Demerara was a region in South America in what is now Guyana that was colonised by the Dutch in 1611. The British invaded and captured the area in 1796...

 and Esequibo. On 20 November 1815 the colony was formally ceded to Britain by the Netherlands.

The colony continued to use Dutch denominations of currency even though under British control. The issued coins ranging from 3 bits up to 3 Guilder. These coins were minted with the colonies name on it, and were minted from 1809 to 1835.

On 18 August 1823, there was a slave rebellion

Slave rebellion

A slave rebellion is an armed uprising by slaves. Slave rebellions have occurred in nearly all societies that practice slavery, and are amongst the most feared events for slaveholders...

 involving more than 10,000 slaves, which resulted in the deaths of hundreds of slaves.

On 21 July 1831 Demerara-Esequibo united with Berbice

Berbice

Berbice is a region along the Berbice River in Guyana, which was between 1627 and 1815 a colony of the Netherlands. After having been ceded to the United Kingdom in the latter year, it was merged with Essequibo and Demerara to form the colony of British Guiana in 1831...

 as British Guiana

British Guiana

British Guiana was the name of the British colony on the northern coast of South America, now the independent nation of Guyana.The area was originally settled by the Dutch at the start of the 17th century as the colonies of Essequibo, Demerara, and Berbice...

.