Rhydycroesau school, January 1926 (there's a separate key)
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Identification based on a note on the back of the photograph, in Jessie Emily Jones' hand:
Rhydycroesau School Children January 1926 Mrs Robertson Headmistress Emlyn Ochor Albert Tangraig David Tyissa Tommy Cynynion Arthur Evans Randal Ridge R.T Cefnmaes Sally Bwlchdongau Gwyneth Maggie Tynewydd Maria Tyissa Mary Tynewydd Jane Tangraig Louisa Tynewydd Dot Tangraig Sara Ellin " Maud Tyissa Mary R'Ochor Sara Cynynion Freda Elsie Rhosddu Emrys Bains Richie R'Ochor Robert Allun Tangraig David Henblas Miss Morris Cefn Byrallt Gwyneth and Freda started School Apl 1925