The above is only a part of the report of the last season's excavation work in the Rhondda, the third season's work of the Rhondda Naturalists' Society. I wish to add that in all our work we were guided and superintended by Mr. H. W. Williams, F.G.S., Solva, Pern. Of the members of the Society who assisted in the work last season, special mention must be made of Canon Lewis, first President of the Society; Mr. Llewelyn Jones, Principal of the Higher Grade School, who was then President; Mr. W. Parfitt, Headmaster of Gelli Schools, our energetic Secretary; Mr. Dan Thomas, Pentre; and Mr. William Griffith. We were very much assisted by some Rhonddaites on their holidays, such as Mr. Robert Lewis, B.A., Mr. Stephen Jones, B.Sc., and Mr. W. J. Davies, the last two from London, who, between them, managed the difficult task of photographing the Crug yr Avan Kist. Accord- ing to his rule, we had again the pleasure of welcoming Col. Morgan, of Swansea, as representative of the "Cambrians." At Crug yr Avan, we were visited by the Rev. J. Jones, Vicar of Llangeinor, and the Misses Jones; Mr. Alfred Griffiths, University College, Cardiff; and Mr. Dan Griffith, Bowes Park, London.