|Prince Vasily Alexandrovich Dolgorukov was stepson of Count P.K. Benckendorff and Major-General in Suite of his Imperial Majesty. As Marshal of the Court, Dolgorukov was assistant to his stepfather (one rank junior in the Court hierarchy). Very devoted to the Emperor, Dolgorukov accompanied the Imperial family to inprisonment in Tobolsk. He was separated from them when they were transferred to Ekaterinburg. Later, Dolgorukov together with General Count Tatishchev was also moved to Ekaterinburg but not allowed into Ipatiev House (where the Imperial family was imprisoned). Both were shot, as was the Empress's lady-in-waiting, Countess Anastasya Hendrikova. Count and Countess Beckendorff shared the Imperial family's detention at Tsarskoe Selo, but did not go to Tobolsk. They escaped to Estonia, where Count Beckendorff died in great poverty in 1921.
Reference: Finding aid to the Letters of Prince Vasily Alexandrovich Dolgorukov.