Sheet 21 SW [First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE & Capt H Wood RE, and Ram Singh. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.34, S.I. 4-5-05.–242. Reg.No.226–S. 05. Incomplete: area of Tsa Chu river only. Printed black and brown; river hand-coloured.
Sheet 22 NE [Lha-Tse Dzong First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE & Capt H Wood RE, and Ram Singh. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.42, S.I. 29-5-05.–242. Reg.No.286–S. 05. Incomplete: area of Tsang-po River only. Printed black and brown; rivers and roads hand-coloured.
Sheet 22 NW [Kyang-Gyap First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE & Capt H Wood RE, and Ram Singh. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.47, S.I. 6-6-05. 242. Reg.No.310–S. 05. Incomplete: area of Tsang-po River only. Extended south into quadrangle 22 SW for tributary streams. Printed black and brown; river and roads hand-coloured.
Sheet 22 SE [Ka-Jü First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE and Capt H M Cowie RE and H Wood RE, and Ram Singh and Hazrat Ali. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.54, S.I. 3-5-1905–242. Reg.No.215–S. 05. Incomplete: small areas at northwest and east only. Printed black and brown; roads hand-coloured.
Sheet 6 NE [Lha-Sa First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE and Capt H M Cowie RE, Sher Jang and Hazrat Ali. Published August 1905. Photozincographed OTB SI Dehra Dun. No.D.48, S.I. 8-6-05. 242. Reg.No.316–S. 05. Extended north into quadrangle 5 SE for tributaries of Chang-ding-ling river. Incomplete: Lhasa and Tsang-po River area only. Printed black and brown; rivers, lakes, sandbanks and roads hand-coloured.
Sheet 6 NW [Shi-Ga-Tse First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE and Capts H Wood RE and H M Cowie RE, and Sher Jang, Ram Singh and Hazrat Ali. Published August 1905. Heliozincographed OTB SI Dehra Dun. No.D.45, S.I. 2-6-05.–242. Reg.No.307–S. 05. Incomplete: Tsang-po River are area to south only. Printed black and brown; rivers, sandbanks and roads hand-coloured.
Sheet 6 SE [Nang-Kar-Tse Dzong First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE and Capt H M Cowie RE, Sher Jang, Dalbir Rai and Hazrat Ali. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.32, S.I. 20-4-1905–242. Reg.No.196–S. 05. Incomplete: Lake Palti area only. Printed black and brown; lakes, glaciers and roads hand-coloured.
Sheet 6 SW [Gyang-Tse First Edition] 1905. Season 1904-05. Surveyed Maj C H D Ryder RE and Capts H Wood RE and H M Cowie RE, and Sher Jang, Ram Singh, Dalbir Rai and Hazrat Ali. Published July 1905. Heliozincographed OTB SI Dehra Dun. No.D.39, S.I. 24-5-1905–242. Reg.No.267–S. 05. Printed black and brown; rivers, glaciers and roads hand-coloured.
Sheet 7 NW [Gang-Tok] Third Edition 1906. Published May 1906. Heliozincographed OTB SI Dehra Dun. No.D.20, S.I. 7-5-06. 242. Reg.No.279-S. 06. Extended north into quadrangle 6 SW for Sikkim. Border at north and west only [enlargement of part of 8-mile sheet 7]. Printed black; boundaries, roads, lakes, glaciers and settlements hand-coloured.