Sheet 5–12/6–13 [Lha-Sa] Second Edition 1908. First edition compiled TBO Dehra Dun September 1897. Second edition compiled TBO Dehra Dun from first edition, and from NETF sheets 5 & 6 second edition October 1906. Published April 1908. Registered 1906. Heliozincographed OTB SI Dehra Dun. No.D.89 S I 6-12-06. 300. Reg.No.32-S. 08. Extended north into quadrangle 11 for continuation of east-west route in Tibet. Printed black and brown; roads, rivers and lakes hand-coloured.