This is from the book "Diary of the Commander of the Imperial Guard" V. M. Bezobrazov:
4/17 January 1916
The supply and sanitary train of the Member of the State Duma Purishkevich arrived this morning. he complained about the difficulties and delays in the train's way and asked me to intervene inhis favor. I did so but, in spite of his insistent demands at the Headquarters of the Front, his train is not allowed to go forward. Purishkevich showed me his huge train, very well equipped, which has a operating car, a large pharmacy, a library, an officers store and kitchen, enough for 20,000 men. In the evening he had supper with me. This political personality gave me the impression of being very nervous, restless, conceited, and ambitious.
5/18 January
Purishkevich has obtained authorization to move his train forward, but he is apparently offended by the lack of attention to him and has declared that he is moving to another front. It is too bad that one has offended him. He has put a great amount of work to organize such a large scale and useful enterprise.
8/21 February
....By order of Empress Alexandra Foedoronva, a bath train with laundry came to us.
Note this is when the author was in command of the Guards army on the Northern front.