Occurrence of Attributes in Original Text

The text related to the cultural heritage 'The Slate Landscape of Northwest Wales' has mentioned 'London' in the following places:

Occurrence Sentence	Text Source
In 1843, the Padarn Railway became the first quarry railway to use steam locomotives, and the transport of slate by train rather than by ship was made easier when the London and North Western Railway built branches to connect Port Penrhyn and Port Dinorwic to the main line in 1852.	WIKI