Fantasia und Fuga Op.5 - Merkel, Gustav Adolf 1827-1885 (Leipzig Erfurt Körner)
Gustav Adolf Merkel (1827-1885) was one of the most performed organ composers in the second half of the 19th century
Page numbers are 3-10 which suggest there might have been something before (and also after) this. So perhaps it is part of a larger publication.
Ex libris Nederlansche Organisten Vereeniging (stamp)
Keywords: 19th Century (1801-1900); Instrumental music; Organ music; Germany