GSL/POR/51/14-3
Portrait of Gen Gregor von HELMERSEN
30 May 1868
LDGSL/838/H/15
Murchison correspondence: letters from Gregor von HELMERSEN
1844-1845
LDGSL/838/H/15/1
Murchison correspondence: letter from Gregor von HELMERSEN
19/31 Aug 1844
LDGSL/838/H/15/2
10/22 Apr 1845
LDGSL/838/H/15/3
20 Nov 1845