1. Mount Everest as seen from Drukair2
Mount_Everest_as_seen_from_Drukair2.jpg: shrimpo1967derivative work: Papa Lima Whiskey 2, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Mount_Everest_as_seen_from_Drukair2_PLW_edit.jpg
2. Photograph of George Everest by Maull & Polyblank
Maull & Polyblank, Public domain, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:George_Everest_-_Maull_%26_Polyblank.jpg
3. Physical map of India
Vigneshdm1990, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Physical_Map_of_India.jpg
4. Photograph of Radhanath Sikdar, 1941
The Modern Review. July 1941, Public domain, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Radhanath_Sikdar_1941.jpg
5. Index of Great Trigonometrical Survey of India
Survey of India, Government of India, Public domain, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:1922_Index_of_Great_Trigonometrical_Survey_of_India.jpg
6. Andrew Scott Waugh 1861
Survey of India, Public domain, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Andrew_Scott_Waugh_1861.jpg
7. Kanchenjunga as seen from Gangtok, Sikkim
Johannes Bahrdt, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Kangchenjunga-from-Gangtok.jpg
8. Papers on the Himalaya and Mount Everest in the Royal Geographical Society of London
Andrew Waugh, Public domain, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:%22Papers_relating_to_the_Himalaya_and_Mount_Everest%22_in_Proceedings_of_the_Royal_Geographical_Society_of_London,_Vol._I_(1857),_p._346.jpg
9. Relief and information about George Everest near Pune Zero Stone
DesiBoy101, CC BY 4.0 https://creativecommons.org/licenses/by/4.0, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Relief_and_information_about_George_Everest_near_Pune_Zero_Stone.jpg
10. Radhanath Sikdar in a stamp of India
India Post, Government of India, GODL-India https://data.gov.in/sites/default/files/Gazette_Notification_OGDL.pdf, via Wikimedia Commons
https://commons.wikimedia.org/wiki/File:Radhanath_Sikdar_2004_stamp_of_India.jpg