Lastly; as to the mean height <lb xmlns="http://www.tei-c.org/ns/1.0" />of the Plains <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">or level surfaces</add> that do occur <lb xmlns="http://www.tei-c.org/ns/1.0" />in <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009370 https://www.geonames.org/1279685">Tibet</placeName>, I am not aware <lb xmlns="http://www.tei-c.org/ns/1.0" />that they affect any particular <lb xmlns="http://www.tei-c.org/ns/1.0" />level. That around <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0018705 https://www.geonames.org/1280615">Mansa<g ref="#typoHyphen" /><pb n="40r" break="no" /> <fw type="folNum">11</fw>rowar</placeName>, & which is the <lb xmlns="http://www.tei-c.org/ns/1.0" />head of the <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0018184 https://www.geonames.org/1115006">Sutlej</placeName> valley, <lb xmlns="http://www.tei-c.org/ns/1.0" />slopes gradually down that <lb xmlns="http://www.tei-c.org/ns/1.0" />river, from <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="15500" unit="foot">15500</measure> to <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="12000" unit="foot">12000</measure> <lb xmlns="http://www.tei-c.org/ns/1.0" /><hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#u">I believe</hi><choice xmlns="http://www.tei-c.org/ns/1.0"> <orig>,</orig> <reg /> </choice> (but speak rather <lb xmlns="http://www.tei-c.org/ns/1.0" />at random<choice xmlns="http://www.tei-c.org/ns/1.0"> <orig>.)</orig> <reg>).</reg> </choice> The loftiest <lb xmlns="http://www.tei-c.org/ns/1.0" />part that approaches to a <lb xmlns="http://www.tei-c.org/ns/1.0" />level of which we know <lb xmlns="http://www.tei-c.org/ns/1.0" />any thing, is probably that <lb xmlns="http://www.tei-c.org/ns/1.0" />crossed by <persName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0004092 http://d-nb.info/gnd/129956252">Turner</persName>, & which, <lb xmlns="http://www.tei-c.org/ns/1.0" /><del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">(</del>though far from <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#u">level</hi>, is <lb xmlns="http://www.tei-c.org/ns/1.0" />not <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#u">rugged</hi><del xmlns="http://www.tei-c.org/ns/1.0" rendition="#s">)</del> <add xmlns="http://www.tei-c.org/ns/1.0" place="superlinear">& it</add> must be about <lb xmlns="http://www.tei-c.org/ns/1.0" /><note xmlns="http://www.tei-c.org/ns/1.0" place="inline" hand="https://edition-humboldt.de/addressee"><measure quantity="2500" unit="toise">2500</measure> – <measure quantity="2657" unit="toise">2657 <choice> <abbr>t.</abbr> <expan>toises</expan> </choice></measure></note><measure xmlns="http://www.tei-c.org/ns/1.0" quantity="16000" unit="foot">16</measure> – <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="17000" unit="foot">17000 feet</measure>.<note xmlns="http://www.tei-c.org/ns/1.0" place="mBottom" hand="https://edition-humboldt.de/addressee"><metamark />ich ehemals <measure quantity="1800" unit="toise">1800 <choice> <abbr>t.</abbr> <expan>toises</expan> </choice></measure> = <measure quantity="11509" unit="foot">11509 feet</measure></note> There are <lb xmlns="http://www.tei-c.org/ns/1.0" />probably equally extensive <lb xmlns="http://www.tei-c.org/ns/1.0" />level portions at <note xmlns="http://www.tei-c.org/ns/1.0" place="inline" hand="https://edition-humboldt.de/addressee"><measure quantity="2814" unit="toise">2814</measure></note><measure xmlns="http://www.tei-c.org/ns/1.0" quantity="18000" unit="foot">18000</measure> to <lb xmlns="http://www.tei-c.org/ns/1.0" /><note xmlns="http://www.tei-c.org/ns/1.0" place="inline" hand="https://edition-humboldt.de/addressee"><measure quantity="2970" unit="toise">2970 toises</measure></note><measure xmlns="http://www.tei-c.org/ns/1.0" quantity="19000" unit="foot">19000 feet</measure>, <hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#u">to the North</hi> of <lb xmlns="http://www.tei-c.org/ns/1.0" /><placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0018705 https://www.geonames.org/1280615">Mansarowar</placeName>, & there are <lb xmlns="http://www.tei-c.org/ns/1.0" />flats at <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H3683728 https://www.geonames.org/1279715">Jigatzi</placeName><note xmlns="http://www.tei-c.org/ns/1.0" place="inline" hand="https://edition-humboldt.de/addressee"><subst> <del rendition="#s"><measure quantity="1857" unit="toise">1857</measure></del> <add place="intralinear"><measure quantity="1875" unit="toise">1875</measure></add> </subst> – <measure quantity="2188" unit="toise">2188 toises</measure></note>(<measure xmlns="http://www.tei-c.org/ns/1.0" quantity="12000" unit="foot">12</measure> – <measure xmlns="http://www.tei-c.org/ns/1.0" quantity="14000" unit="foot">14000</measure>) <lb xmlns="http://www.tei-c.org/ns/1.0" /><placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0011427 http://www.geonames.org/1280737">Lhassa</placeName> <note xmlns="http://www.tei-c.org/ns/1.0" place="inline" hand="https://edition-humboldt.de/addressee"><measure quantity="1563" unit="toise">1563 <choice> <abbr>t</abbr> <expan>toises</expan> </choice></measure></note><measure xmlns="http://www.tei-c.org/ns/1.0" quantity="10000" unit="foot">10000</measure><metamark xmlns="http://www.tei-c.org/ns/1.0">?</metamark> & others I <lb xmlns="http://www.tei-c.org/ns/1.0" />believe still lower down<pb xmlns="http://www.tei-c.org/ns/1.0" n="40v" /> <fw xmlns="http://www.tei-c.org/ns/1.0" type="folNum">12</fw>the <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010714 https://www.geonames.org/1208092">Tsampu</placeName>: there are <lb xmlns="http://www.tei-c.org/ns/1.0" />also flats around the <ref xmlns="http://www.tei-c.org/ns/1.0" xml:id="eff42acb-fcd3-4233-b42a-cbfcd3023383" corresp="#d30aef93-7cfe-4103-8aef-937cfe9103be" type="editorialNote">Salt <lb />Lakes</ref><note xmlns="http://www.tei-c.org/ns/1.0" xml:id="d30aef93-7cfe-4103-8aef-937cfe9103be" corresp="#eff42acb-fcd3-4233-b42a-cbfcd3023383" type="editorial">Zu den Salzseen nördlich des <placeName ref="https://edition-humboldt.de/H0010714 https://www.geonames.org/1208092">Yarlung Tsangpo</placeName> und von <placeName ref="https://edition-humboldt.de/H3683728 https://www.geonames.org/1279715">Xigazê</placeName> gehören u.a. der <placeName ref="https://edition-humboldt.de/H0020611 https://www.geonames.org/1280502">Namtso</placeName>, <placeName ref="https://edition-humboldt.de/H6223956 https://www.geonames.org/1279983">Serling Tsho</placeName> und <placeName ref="https://edition-humboldt.de/H6085889 https://www.geonames.org/1279916">Tangra Yumco</placeName>.</note>, North of the <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010714 https://www.geonames.org/1208092">Tsampu</placeName>, <lb xmlns="http://www.tei-c.org/ns/1.0" />but we know nothing at all <lb xmlns="http://www.tei-c.org/ns/1.0" />definitely of 19/20 of <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009370 https://www.geonames.org/1279685">Tibet</placeName>, & <lb xmlns="http://www.tei-c.org/ns/1.0" />I believe that 9/10 of the country <lb xmlns="http://www.tei-c.org/ns/1.0" /><hi xmlns="http://www.tei-c.org/ns/1.0" rendition="#mMM" hand="https://edition-humboldt.de/addressee">has never been traversed by <lb />man, being as <choice> <sic>inaccessable</sic> <corr>inaccessible</corr> </choice> <lb />as the <ref xml:id="b054f7af-77c6-4932-94f7-af77c6993281" corresp="#adcab939-0940-46a1-8ab9-39094026a16e" type="editorialNote">Polar Seas</ref><note xml:id="adcab939-0940-46a1-8ab9-39094026a16e" corresp="#b054f7af-77c6-4932-94f7-af77c6993281" type="editorial">Hiermit ist sowohl der <placeName ref="https://edition-humboldt.de/H0017285 https://www.geonames.org/2960860">Arktische</placeName> als auch der <placeName ref="https://edition-humboldt.de/H0020731 https://www.geonames.org/4036776">Antarktische Ozean</placeName> gemeint.</note></hi> & quite as <lb xmlns="http://www.tei-c.org/ns/1.0" />barren. After all I believe that <lb xmlns="http://www.tei-c.org/ns/1.0" />the average distance „as the crow <lb xmlns="http://www.tei-c.org/ns/1.0" />flies“ performed <subst xmlns="http://www.tei-c.org/ns/1.0"> <del rendition="#ow">i</del> <add place="across">o</add> </subst>n the routes, <lb xmlns="http://www.tei-c.org/ns/1.0" />is the best criterion of the <lb xmlns="http://www.tei-c.org/ns/1.0" />amount of level country crossed, <lb xmlns="http://www.tei-c.org/ns/1.0" />& we may judge from all our <lb xmlns="http://www.tei-c.org/ns/1.0" />materials that so far as this <lb xmlns="http://www.tei-c.org/ns/1.0" />is concerned, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009370 https://www.geonames.org/1279685">Tibet</placeName> is one of the <lb xmlns="http://www.tei-c.org/ns/1.0" />most impracticable countries <lb xmlns="http://www.tei-c.org/ns/1.0" />in the world.