This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
City and South London Railway Engineering Drawing. City and South London Railway from Stockwell to King William Street from the Minutes of the Proceedings of the Institution of Civil Engineers The railway was the first tube railway and opened in Originally published in in the Minutes of Proceedings of the Institution of Civil Engineers