Alexander von Humboldt Autograph

Autograph letter signed, one page - with red wax seal and address to the reverse of an adjoining sheet, 5,25 x 6,5 inch, Berlin, 29.11.1840, in German, to Captain Baron von Vincke* - concerning geographical activities in Asia, written and signed in dark ink "A.v. Humboldt", attractively mounted (removable) for fine display with a picture, shows Alexander von Humboldt sitting in a chair with a map (altogether 11,75 x 8,25 inch), with three horizontal mailing folds, mild stains, and paper loss to a corner of the adjoining address sheet - in fine condition.

In parts:
"Ich glaube heute endlich, Ihre und Ihrer Freunde schöne Arbeiten über Klein Asien losgeeist zu haben. Gen. Thiele** soll [...] Vorschläge über die Art der Herausgabe und Concentracion einer der Arbeiten [...] machen. Auf die Art der Au(s)führung darf ich keinen Einfluss ausüben [...] Es wäre zu beklagen, wenn bei der vielen Thätigkeit, welche jetzt über den Geographen von Klein Asien ausbricht den Officiren des Preuss. General Stabs eine Ehre genommen würde die Ihnen gehört [...]"

Translated:
" Today I finally believe that I have disengaged your and your friends beautiful work on Asia Minor. Gen. Thiele** should [...] make suggestions on how to publish and concentrate one of the works [...] I am not allowed to exert any influence on the type of execution [...] It would be lamentable if in the many activities that are now breaking out over the geographers of Asia Minor, the officers of the Pruss(ian) General Staff wouldn`t be honored with the honor that belongs to them [...]"

* Baron von Vincke had taken part together with the officers Fischer and Mühlbach in Moltke's military mission in the Ottoman Empire and on this occasion probably worked geographically - Helmuth von Moltke had been from 1835 to 1839 at the invitation of the Foreign Minister as a military advisor in the Ottoman Empire 
** Probably the general and statesman Ludwig Gustav von Thiele