That is a great picture! It looks like Alexandra might still be in mourning for Eddy (who died in Jan 1892). From what I could tell, it looks like there's Queen Louise, Greek George (with one of his sisters?), Queen Alexandra, Christian IX, Aunt Swan (?), Bertie, Waldemar, AIII, Marie Feodorovna, Christian IX, Marie Orleans and Thyra amongst others. It was probably when the whole family (or at least almost all) was gathered for the Golden Anniversary of Christian & Louise. Usually Bertie didn't go on the family visits to Denmark.