 The Coldrum Stones have been excavated on multiple occasions . On 16 April 1910 , the amateur archaeologist F. J. Bennett began excavation at the site , after previously having uncovered some Neolithic <unk> from Addington Long Barrow . He soon discovered human bones " under only a few inches of <unk> soil " . He returned to the site for further excavation in August 1910 , this time with his niece and her husband , both of whom were dentists with an interest in <unk> ; on that day they discovered pieces of a human skull , which they were able to largely reconstruct . A few days later he returned to excavate on the north @-@ west corner of the dolmen with the architect E. W. Filkins ; that day , they found a second skull , further bones , a flint tool , and pieces of pottery . 
