 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 lithics from Addington Long Barrow . He soon discovered human bones " under only a few inches of chalky 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 craniology ; 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 . 
 The Coldrum Stones <a href='been_done' title='1'><mark>have</mark></a> been excavated on multiple occasions . On 16 April 1910 , the amateur archaeologist F. J. Bennett began excavation at the site , after previously <a href='been_done' title='2'><mark>having</mark></a> uncovered some Neolithic lithics from Addington Long Barrow . He soon discovered human bones " under only a few inches of chalky soil " . He returned to the site for further excavation in August 1910 , this time with his niece and her husband , both of whom <a href='uninflect' title='3'><mark>were</mark></a> dentists with an interest in craniology ; on that day they discovered pieces of a human skull , which they <a href='uninflect' title='4'><mark>were</mark></a> 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<a href='been_done' title='5'><mark></mark></a> found a second skull , further bones , a flint tool , and pieces of pottery . 
Da Coldrum Stones done been excavated on multiple occasions . On 16 April 1910 , the amateur archaeologist fuc. J. Bennett began excavation at the site , after previously done uncovered some Neolithic lithics from Addington Long Barrow . He soon discovered human bones " under only a few inches of chalky soil " . He returned to tdasite for further excavation in August 1910 , this time witt his niece and her husband , both of whom was dentists with an interest in craniology ; on dat day they discovered pieces of a human skull , which they was able to largely reconstruct . A few dayz later he returned to excavate on the north @-@ west corner of thdaolmen with thedachitect E. wit. Filkins ; tdatday , they done found a second skull , further bones , a flint tool , and pieces of pottery .