Herbert Henry Thomas FRS[1] (13 March 1876 - 12 May 1935 ) was a British geologist who linked the bluestones at Stonehenge with rocks in south west Wales.
[2] He was educated at Exeter School under W. A. Cunningham and was admitted to Sidney Sussex College, Cambridge, on 1 October 1894.
Thomas won the Sedgwick prize in 1903 and was assistant to Professor William Johnson Sollas at Oxford, earning B.A.
[5] Thomas was an archaeologist, and an expert on how rock was used by primitive people for weapons and monuments.
[3] In 1923, he was the first to propose that the bluestones used in the construction of Stonehenge were identical to rocks in the Preseli Hills in Pembrokeshire, Wales.