Several of the autograph letters in the collection are addressed to Hermann Georg Fiedler, though the collection also includes some of his own autograph material, as well as autograph material that he collected. Other items were collected by the Library. Some of the individuals represented are listed below:
- Hermann Georg Fiedler, 27 items, late 19th-early 20th century
- Ferdinand Freiligrath, 5 items, 1845-66
- Johann Wolfgang von Goethe, 5 items, 1798-1829
- Gerhart Hauptmann - mainly letters written by Gerhart and Margarete Hauptmann to H.G. Fiedler and Mrs Fiedler, as well as images of Gerhart Hauptmann, and letters written to Miss Herma Fiedler concerning the friendship between her father, H.G. Fiedler, and Gerhart Hauptmann, 201 items, 20th century
- Joseph Kainz, 2 items, 1877
- Heinrich Laube, 4 items, 19th century
- Friedrich Max Mller, 22 items, late 19th century
- Jean Paul Friedrich Richter, 2 items, 1807-11
- Rainer Maria Rilke - 6 autograph letters of Rilke, 1899-1926, with letters and notes regarding them, mainly by H.G. Fiedler, 1939-43
- Georg Sauter, 23 autograph letters to H.G. Fiedler, with images of Sauter, early 20th century
- Ernst Stadler, letters to H.G. Fiedler, 1911-14, and letters concerning Stadler, many addressed to Fiedler, from others, 1911-83
- Ludwig Tieck, 2 letters, 19th century
The full shelfmarks of the collection are as follows: MSS. G/ANONYMOUS.1-2; MS.G/ANZENGRUBER.1; MS.G./APATHY.1; MSS.G/BAHR.1-2; MS.G/BANKNOTES.1; MSS.G/BAUMBA.1-2; MSS.G/BECKER.1-3; MS.G/BERNSTORFF.1; MS.G/BERNUS.1; MS.G/BETTINGEN.1; MSS.G/BINDING.1-16; MS.G/BLCH DC;THGEN.1; MS.G/BODENSTEDT.1; MS.G/BONDI.1; MSS.G/BONSELS.1-2; MSS.G/BRAHMS.1-2; MS.G/BROADBENT.1; MSS.G/BRU.1-2; MSS.G/BULTHAUPT.1-5; MSS.G/BUSCH A.1-2; MSS.G/BUSCH G.1-6; MS.G/CAROSSA.1; MS.G/CHAMISSO.1; MSS.G/COX.1-2; MSS.G/DCHAuml;UBLER.1-2; MS.G/DAHN.1; MSS.G/DAHRENDORF.1-3; MSS.G/DAUTHENDEY.1-2; MSS.G/DAVID.1-2; MSS.G/DEHMEL.1-6; MS.G/DICKINSON.1; MS.G/DIEZ.1; MS.G/DINGELSTEDT.1; MSS.G/EBNER-ES ENBACH.1-2; MS.G/EDSCHMID.1; MSS.G/EULENBERG.1-2; MS.G/FALKE.1; MS.G/FIEDLER E.1; MSS.G/FIEDLER H.1-4; MSS.G/FIEDLER H.G.1-27; MS.G/FLAISCHLEN.1; MS.G/FRANKL.1; MSS.G/FREILIGRATH.1-5; MS.G/FRENSSEN.1; MSS.G/FREYTAG.1-4; MSS.G/FRIEDLCHAuml;NDER.1-10; MS.G/FULDA.1; MS.G/GANGHOFER.1; MSS.G/GERRANS.1-2; MS.G/GODLEY.1; MSS.G/GOETHE J.W.v.2-6; MS.G/GOETHE O.v.1; MS.G/GRAF.1; MS.G/GREGOROVIUS.1; MS.G/GREIF.1; MSS.G/GRIMM H.1-14; MS.G/GROTH.1; MS.G/GR DC;BER.1; MS.G/GURA.1; MS.G/HAECKEL.1; MS.G/HNDEL-MAZZETTI.1; MS.G/HALM.1; MS.G/HAMBURG.1; MSS.G/HAUPTMANN G.1-95; MSS.G/HAUPTMANN M.1-106; MS.G/HAYDN.1; MSS.G/HESSE.1-2; MS.G/HESSE-ROTHENBURG.1; MS.G/HEUSER.1; MS.G/HEYSE.1; MSS.G/HOES.1-6; MS.G/HOLZ.1; MSS.G/HUCH.1-3; MS.G/JAEGER.1; MSS.G/JENSEN.1-2; MSS.G/KAINZ.1-2; MS.G/KARL AUGUST.1; MS.G/KASSNER.1; MS.G/KESSEL.1; MS.G/KIRCHWEY.1; MS.G/KLAPROTH.1; MS.G/KLINGLER.1; MS.G/KOTZEBUE.1; MS.G/KREMSER.1; MSS.G/LAUBE.1-4; MSS.G/LAUTERBACH.1-2; MS.G/LAVATER.1; MS.G/LERSCH.1; MS.G/LILIENCRON.1; MS.G/LUDWIG.1; MS.G/MENDELSSOHN.1; MS.G/MEYER A.1; MS.G/MEYER A.R.1; MSS.G/MEYERBEER.1-2; MS.G/MEYER K.1; MSS.G/MIEGEL.1-3; MS.G/MOMBERT.1; MS.G/MOMMSEN.1; MS.G/MCH DC;HLFELD.1; MSS.G/M DC;LLER.1-22; MSS.G/M DC;NHAUSEN.1-3; MS.G/MUIRHEAD.1; MS.G/NEURATH.1; MS.G/OESER.1; MS.G/PAOLI.1; MS.G/PICHLER.1; MSS.G/PRESBER.1-7; MS.G/RAPP.1; MS.G/RASPE.1; MSS.G/RAUMER.1-3; MS.G/REICHART.1; MS.G/REINECKE.1; MS.G/REISCHACH-SCHEFFEL.1; MSS.G/RICHTER H.1-2; MSS.G/RICHTER J.P.F.1-3; MSS.G/RILKE.1-12; MS.G/RODA.1; MS.G/ROSEGGER.1; MS.G/SAAR.1; MSS.G/SALUS.1-2; MSS.G/SAUTER G.1-26; MSS.G/SAUTER L.1-4; MSS.G/SAUTER R.1-2; MSS.G/SAUTER V.1-5; MSS.G/SAXE-COBURG.1-8; MSS.G/SCHAUKAL.1-5; MS.G/SCHEFFEL J.1; MSS.G/SCHEFFEL V.1-2; MSS.G/SCHLEGEL.1-2; MS.G/SCHNEIDER.1; MS.G/SCHNITZLER.1; MS.G/SCHUBART.1; MS.G/SEIDENFADEN.1; MSS.G/SPINDLER.1-2; MS.G/SPITTELER.1; MSS.G/STADLER.1-29; MS.G/STANGE.1; MSS.G/STRAUSS.1-5; MS.G/STRAUSS U. TORNEY.1; MSS.G/STRONG.1-2; MSS.G/TIECK.1-2; MSS.G/UNRUH.1-3; MS.G/VARNHAGEN.1; MSS.G/VOSS.1-3; MS.G/VULPIUS.1; MS.G/WASSERMANN.1; MSS.G/WERFEL.1-2; MS.G/WIENBARG.1; MSS.G/WILDENBRUCH.1-2; MS.G/WINCKLER.1; MS.G/WOLZOGEN.1; MS.G/ZAHN.1; MS.G/ZARNKE.1; MS.G/ZIMMERMANN.1