[1] The location of the ironstone seam at Skelton was 390 feet (120 m) below sea level, and so a great deal or preparation work was undertaken to ready the site before mining could begin.

[8] To combat this water and because of possible flooding, the mine was equipped with three turbines capable of moving 1,000 imperial gallons (4,500 L; 1,200 US gal) per minute.

[15] Records show that in 1910, North Skelton was forwarding four full freight trains per day to the smelters on south Teesside.

[16] In 1929, the assets of Bolckow, Vaughan and Co, were acquired by Dorman, Long & Co.[17] The second owners held the mine until January 1964, when it was closed.

[19] Between 1876 and 1949, 36 men died in the mine through various accidents such as crushing injuries, roof falls, explosions and limbs being removed by passing trains.