Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Pontcysyllte Aqueduct and Canal' has mentioned 'White' in the following places:
Occurrence Sentence Text Source
[20] The trough was made from flanged plates of cast iron, bolted together, with the joints bedded with Welsh flannel and a mixture of white lead and iron particles from boring waste.
After 25 years the white lead was replaced with ordinary tar.