The National Library of Norway periodically posts new scans of Norwegian newspapers from the 1870s-1880s that reveal information about Theodora Cormontan as a music distributer, a music publisher, and a composer in Arendal.
Advertisements listing Cormontan compositions published by Warmuth Music appear in the Aftenposten as early as September 16, 1874. Other issues that promote her music published by Warmuth include May 19,1875; May 25,1875, December 15, 1879; and December 17, 1879. Notably, the April 27, 1885 edition features an ad promoting her music now published by the Theodora Cormontan Publishing Co. of Arendal.
Cormontan began her own publishing company in 1879, but it would appear that she notified Warmuth Publishing of her intentions to start her own business as early as 1877, prompting the following from the Lillesands-Posten of 3/23/1877:
Notice!! Miss Theodora Cormontan of Arendal will still be provided with the newest Music from my Music Store and orders will be executed and presented to her as soon as possible. Carl Warmouths [sic] Music –Establishment, Christiania [now Oslo].
Other Norwegian newspapers where Cormontan's published music is advertised include:
Dagbladet: 9/16/1874, 12/13/1879, 12/15/1879
Fredriksstad Tilskuer: 2/10/1876, 7/9/1876, 7/18/1876
Hedemarkens Amtstidende: 12/22/1875
VG (VerdensGang): 12/18/1879
The Arendal newspaper Agderposten, first published in 1874, is a primary source of information about Theodora Cormontan before she came to the U. S. in 1887. The following items [electronically translated] all appeared in this paper.
[The following concert announcement documents that Theodora Cormontan composed in larger forms than reflected in the scores we found in St. Peter, Minnesota. Here we find that she composed the music to what is essentially a one-act opera. Although the article doesn't say, we can assume that the work was accompanied by the orchestra that also performed on the program. Knowing about this composition adds credence to the theory that Cormontan desired to compose in larger forms; to compete and be considered with the same respect as men composers.]
"Lark." Singspiel in 1 act by M. V. Brun [written in 1868]. The music is composed by Theodora Cormontan. The characters include: Maria, a florist; her brother Andreas, a gardener; Lord Olboy, Box, [and other characters]. The action takes place in Maria's Flower Shop. The Tunernes Music Association, assisted by the Dilettant Association, present an Evening Entertainment at 8 p.m. on Friday, March 19, 1886 in the Theater. [The program included music by the Turners band and orchestra. “Lark” was the featured work of the evening. Reserved seating cost 1.25 Kr., unreserved cost 1 Kr. Tickets could be purchased at the homes of Hans Rummelhoff and P. N. Jacobsen, or at the door beginning at 7 p.m. the evening of the performance].
Notice! A very good organ-harmonium with a beautiful, rich tone and walnut case is for sale at a low price at Th. Cormontan’s Music Store.
New Music issued today: Theodora Cormontan: op. 46. "National-Festmarsch," composed for the occasion of the National Turnfest in Fredrikshald and dedicated to Norway's Turners. Piano 2-hand 0,75. Piano 4-hand 1.25. Th. Cormontan's Music Publishing.
[An advertisement placed by C. O. Bye announces a concert in the Theater on Monday, January 31. The program includes a band performing Cormontan’s "Norske Turneres National-Festmarsch."]