Collection includes 67 letters and telegrams, by Alexander's older brother Nikolaĭ; 65 letters and notes, some copies, by Nicholas II, from 1902-1913; a drawing and notes by Alexander III; and drafts of letters by Meshcherskiĭ. Also included is a group of letters in different hands hitherto identified as having been written by Nikolaĭ, Duke of Leuchtenberg, to Meshcherskiĭ.