John Cadman, 1st Baron Cadman

Cadman was educated at Armstrong College, University of Durham, and received a first class Honours in Geology in 1899.

[2] Cadman served as Inspector of Mines in Trinidad and Tobago in the first decade of the 20th century.

In this effort Cadman was joined by Arthur "Beeby" Thompson who was an engineer with oilfield experience in Russia.

[5] He expanded production fourfold and eventually joined a venture by Henri Deterding of Royal Dutch/Shell to stabilize petroleum prices.

On 7 June 1937 he was raised to the peerage as Baron Cadman, of Silverdale in the County of Stafford.