501. IOR/L/PS/20/A118/3 Reference (shelfmark): IOR/L/PS/20/A118/3 Title: Corrections to routes in Sinkiang, 1926 Simla: General Staff India, 1st series, 1927 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1927 Extent: 19pp
502. IOR/L/PS/20/A118/4 Reference (shelfmark): IOR/L/PS/20/A118/4 Title: Corrections to routes in Sinkiang, 1926 Simla: General Staff India, 2nd series, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: 44pp
503. IOR/L/PS/20/A119 Reference (shelfmark): IOR/L/PS/20/A119 Title: Photographs taken by Lt-Col Sir Percy Sykes to illustrate Chinese Turkestan, the Russian Pamirs and Osh. April-November, 1915 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1915 Extent: 48 photos
504. IOR/L/PS/20/A121 Reference (shelfmark): IOR/L/PS/20/A121 Title: Personalities in Trans-Caucasia. 1919 Simla: General Staff India, 1920 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1920 Extent: i, 181pp
505. IOR/L/PS/20/A122 Reference (shelfmark): IOR/L/PS/20/A122 Title: Who's Who in Central Asia Simla: General Staff India, 1929 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1929 Extent: iii, 158pp
506. IOR/L/PS/20/A123/1 Reference (shelfmark): IOR/L/PS/20/A123/1 Title: Routes in Russian Central Asia, Part I. Trans-Caspia and Khiva Simla: General Staff India, 1922 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1922 Extent: iii, 164pp map (in pocket)
507. IOR/L/PS/20/A123/2 Reference (shelfmark): IOR/L/PS/20/A123/2 Title: Routes in Russian Central Asia, Part II. Samarkand and Bokhara excluding Karategin, Darwaz, Roshan and Shignan. 1923 Simla: General Staff India, 1924 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1924 Extent: iii, 173pp map (in pocket)
508. IOR/L/PS/20/A123/3 Reference (shelfmark): IOR/L/PS/20/A123/3 Title: Routes in Russian Central Asia, Part III. Ferghana, Semirechia, Samarkand. 1923 Delhi: General Staff India, 1924 Collection Area: India Office Records and Private Papers Languages: English Date Range: 1924 Extent: ii, 162pp map (in pocket)
509. IOR/L/PS/20/A123/4 Reference (shelfmark): IOR/L/PS/20/A123/4 Title: Report on the British Military Mission, South Russia. 8th October, 1919. [By Maj-Gen H C Holman, Officer Commanding] [London: War Office, 1919] Collection Area: India Office Records and Private Papers Languages: English Date Range: 1919 Extent: 56pp
510. IOR/L/PS/20/B Reference (shelfmark): IOR/L/PS/20/B Title: Political and Secret Department Library: 'B' Books Scope & Content: Covers Afghanistan, Baluchistan, North West Frontier of India, Jammu and Kashmir and Northern Frontier of India Collection Area: India Office Records and Private Papers Languages: English Date Range: 1834-1944 Extent: 163 volumes (180 items)