Page [7]: changed "108p." to "108pp." (Leipzig: 1883, 108pp., illus., 8o.)
Page [8]: added missing full stop after "3" (3. Die Postwertzeichen der spanischen Kolonien.)
Page [13]: added missing full stop ( ... 1891, 128pp. L. 8o.)
Page [15]: added missing opening bracket ([1897] viii., 191 pp., Sm. 8o.)
Page [16]: changed "hand books" (with no hyphen at end of line) to "handbooks" (The Stanley Gibbons philatelic handbooks)
Page [17]: added missing final full stop (plate [Philatelistische Bibliothek, band 6], 8o.)
Page [19]: added missing open bracket ([Verein für Briefmarkenkunde.])
Page [22]: added missing final full stop ([1902] vii. 124pp. 16o.)
Page [22]: added (suspected) missing colon (Leipzig: Weber, 1895, vi., 221pp.)
Page [23]: added missing final full stop (vol. 9-16, September 1, 1894—September 23, 1902.)