The library of Bonn university has kept 4 Ethiopian manuscripts but one was lost during the 2WW.
1864-1876 : Catalogus librorum manuscriptorum orientalium in Biblioteca academica Bonnensi servatorum, Bonnae Litteris Caroli Georgi, pp. 98-100
One manuscript formerly belonging to J.L. Krapf, was given in 1861 to the university by Ms. Bluhme (Zanutto, 1932, p. 52) and would have been lost during the 2WW (Beylot & Rodinson, 1995, p. 45).
1994 : VOHD XX, 6, pp. 199-202
3 manuscripts amongst which one was taken in Mägdäla by Gerhard Rohlfs in 1868.