Grand Duchesses Olga, Tatiana and Anna Vyrubova at the hospital at Tsarskoe Selo c. 1915.

Empress Alexandra with Grand Duchesses Tatiana and Olga at the lazaret at Tsarskoe Selo: c. 1915. 

Grand Duchesses Maria and Tatiana with their father, Nicholas II at Peterhof: 1915. 

Grand Duchesses Olga and Tatiana in nursing uniform: 1915.

Grand Duchesses Olga and Tatiana at the piano with some wounded officers from the lazaret: c. 1915.

Grand Duchesses Maria and Anastasia visiting some wounded soldiers: 1915. (this one was new to me) 

Grand Duchesses Maria and Anastasia visiting wounded soldiers: 1915. 

Empress Alexandra and her daughters Grand Duchesses Olga and Tatiana in their nursing uniforms c. 1915. 

Princess Irina Alexandrovna Yussupova c. 1915.

Grand Duchesses Olga and Tatiana playing croquet with their mother and some wounded soldiers from their hospital at Tsarskoe Selo: c. 1915.