Ngokusekelwe esigabeni esilandelayo, bhala uhlu lweziqongo zaseHimalaya ezahlolwa futhi zatholakala phakathi nekhulu le - 19.
Context:Ngo - 1802, abaseBrithani baqala i - Great Trigonometrical Survey of India ukuze banqume izindawo, ukuphakama, namagama ezintaba eziphakeme kunazo zonke emhlabeni. Eqala eningizimu yeNdiya, amaqembu okuhlola athuthela enyakatho esebenzisa ama-theodolite amakhulu, ngalinye elinesisindo esingamakhilogremu angu - 500 futhi elidinga amadoda angu - 12 ukuba alithwale, ukuze alinganise ukuphakama ngokunembile ngangokunokwenzeka. Bafika emagqumeni aseHimalaya ngawo-1830, kodwa iNepal yayingazimisele ukuvumela abaseBrithani ukuba bangene ezweni ngenxa yokusola izinhloso zabo. Izicelo eziningana zabahloli zokuba bangene eNepal zanqatshwa.  AmaBrithani aphoqeleka ukuba aqhubeke nokuqapha kwawo eseTerai, isifunda esiseningizimu yeNepal esifana neHimalaya. Izimo zaseTerai zazinzima ngenxa yezimvula ezinamandla nomalaleveva. Izikhulu ezintathu zokuhlola zabulawa umalaleveva kuyilapho ezinye ezimbili kwadingeka zithathe umhlalaphansi ngenxa yempilo ebuthaka.  Noma kunjalo, ngo - 1847, abaseBrithani baqhubeka nokuhlola futhi baqala ukuhlola imininingwane yeziqongo zaseHimalaya besuka eziteshini zokuqapha eziqhele ngamakhilomitha angu - 240 (150 mi). Isimo sezulu sasivimbela umsebenzi ezinyangeni ezintathu zokugcina zonyaka. Ngo-November 1847, u-Andrew Waugh, uMhloli Omkhulu WaseBrithani waseNdiya, wenza ukuhlola okuningana esesiteshini saseSawajpore empumalanga yezintaba zaseHimalaya. Ngaleso sikhathi iKangchenjunga yayibhekwa njengentaba ephakeme kunazo zonke emhlabeni, futhi enesithakazelo, waphawula enye intaba engalé kwayo, eqhele ngamakhilomitha angaba ngu - 230 (140 mi). UJohn Armstrong, omunye wabasebenza ngaphansi kukaWaugh, naye wabona lesi siqongo sisendaweni ekude ngasentshonalanga futhi wasibiza ngokuthi isiqongo "b". Kamuva uWaugh wabhala ukuthi ukubonwa kwabonisa ukuthi isiqongo "b" sasiphakeme kuneKangchenjunga, kodwa ngenxa yobude obukhulu bokuqashelwa, kwakudingeka ukubonwa okuseduze ukuze kuqinisekiswe. Ngonyaka olandelayo, uWaugh wathumela isikhulu sokuhlola emuva eTerai ukuze sihlolisise isiqongo "b", kodwa amafu aphazamisa imizamo yakhe.  Ngo-1849, uWaugh wathumela uJames Nicolson kule ndawo, owenza ukubonwa okubili esuka eJirol, eqhele ngamakhilomitha angu-190. UNicolson wabe esethatha i-theodolite enkulu kunazo zonke futhi waya empumalanga, ethola ukubonwa okungaphezu kuka-30 ezindaweni ezinhlanu ezihlukene, kanti esiseduzane kwakungu-174 km (108 mi) ukusuka esiqongweni.  UNicolson wabuyela ePatna emfuleni iGanges ukuze enze izibalo ezidingekayo ezisekelwe kulokho ayekubonile. Imininingwane yakhe eluhlaza yanikeza ukuphakama okuphakathi kuka - 9200 m (30,200 ft) esiqongweni "b", kodwa lokhu akuzange kuthathe i - refraction yokukhanya, eyenza ukuphakama kusonteke. Nokho, le nombolo yabonisa ngokucacile ukuthi isiqongo "b" sasiphakeme kuneKangchenjunga. UNicolson wathola umalaleveva futhi waphoqeleka ukuba abuyele ekhaya engakaqedi izibalo zakhe. UMichael Hennessy, omunye wabasizi bakaWaugh, wayeseqalile ukubiza iziqongo ngezinombolo zamaRoma, kanti iKangchenjunga yayibizwa ngokuthi i-Peak IX. I-Peak "b" manje yaziwa ngokuthi i-Peak XV.  Ngo - 1852, eRadhanath Sikdar, isazi sezibalo nomhloli wamazwe waseNdiya waseBengal, owayehlala endlunkulu yokuhlola eDehradun, waba ngowokuqala ukukhomba i - Everest njengentaba ephakeme kunazo zonke emhlabeni, esebenzisa izibalo ze - trigonometric ezisekelwe ekulinganisweni kukaNicolson. Isimemezelo esisemthethweni sokuthi i-Peak XV yayiyiyona ephakeme kunazo zonke sahlehliswa iminyaka eminingana njengoba izibalo zaziqinisekiswa ngokuphindaphindiwe. UWaugh waqala ukusebenza ngemininingwane kaNicolson ngo-1854, futhi kanye nabasebenzi bakhe wachitha cishe iminyaka emibili esebenza ngezinombolo, kwadingeka abhekane nezinkinga zokuphambuka kokukhanya, ingcindezi ye-barometric, nokushisa ebangeni elikhulu lokubuka. Ekugcineni, ngo-March 1856 wamemezela akutholile encwadini ayibhalela isekela lakhe eKalcutta. IKangchenjunga kwathiwa ingamamitha angu - 8 582 (28,156 ft), kuyilapho iPeak XV yanikezwa ukuphakama kwamamitha angu - 8 840 (29,002 ft). UWaugh waphetha ngokuthi iPeak XV "mhlawumbe iyona ephakeme kunazo zonke emhlabeni". I-Peak XV (kulinganiswa ngamamitha) yabalwa ukuthi iphakeme ngamamitha angu-29,000 (8,839.2 m), kodwa yamenyezelwa esidlangalaleni ukuthi iphakeme ngamamitha angu-29,002 (8,839.8 m) ukuze kugwenywe umbono wokuthi ukuphakama okuqondile kwamamitha angu-29,000 (8,839.2 m) kwakungelutho ngaphandle kwesilinganiso esihlanganisiwe. Ngezinye izikhathi uWaugh udlalwa ngokuthi "umuntu wokuqala ukugibela intaba i-Everest".
Iziqongo zaseKangchenjunga naseNtabeni i-Everest ezisezintabeni zaseHimalaya zabonwa ngokuhlola okwenziwa ngekhulu le - 19.