The first published plan of the monument came from E.H.W. Dunkin in 1871, although a more detailed plan was published by Flinders Petrie in 1878, and the first photograph of the site was published in 1893. In 1910, F.J. Bennett undertook an excavation at the site, revealing the bones of 22 individuals, of both sexes and various ages, along with a pot sherd and a flint saw, which had been buried in the north-western part of the monument. Further bones were excavated in a 1922 excavation by E.W. Filkins, but these were largely lost during the Second World War. In 1926, the monument was given to The National Trust who dedicated it as a memorial to the local historian Benjamin Harrison. In 1946, the folklorist John H. Evans noted that locally, the Coldrum Long Barrows had come to be associated with the folkloric trope of the countless stones. The site is open free of charge to the public throughout the year, and can be accessed by foot along Coldrum Lane.