One example. OCR (Optical Character Recognition) error:

Mines and minerals. Summaries of the reports of the inspectors of mines to Her Majesty's Secretary of State, and mineral statistics of the United Kingdom of Great Britain and Ireland, including lists ..., 1884Edit

Carnforih. Birkby Colliery Co., Maryporfc - Maryport Hematite Iron Co., JIaryporfc. "Whitehaven Hematite Iron and Steel Co., Clcator Moor via Carnforth. Jos. Harris, Brayion Colliery, Aspairia. "West Cumberland Iron & Steel Co., Workingtoj-. Lonsdalc Hematite Iron & Steel Co., Ball-gill,

(Source: Connected Histories).