The texts available in the 'folklore' section of the secular prose
texts in the Swedish Diachronic Corpus are listed below:

 Sagan om Karl Magnus						1380--1400
 Sju vise mästare	 	 				1430--1492
 Sagan om Didrik av Bern	 	 	 		1480--1510
 Christfrid Ganander: Mythologia Fennica	 		1789	 
 George Stephens: Svenska folk-sagor och äfventyr	 	1844	 
 Otto Donner: Indernas föreställningar on verldsskapelsen	1863	 
 Viktor Rydberg: Medeltidens magi	 			1865	 
 Daniel Anton Sundén: Öfversigt af Nordiska Mytologien	 	1884	 
 Viktor Rydberg: Fädernas gudasaga	 			1887	 
 Viktor Rydberg: Om hjältesagan å Rökstenen	 		1892	 
 A. U. Bååth: Nordmanna-Mystik	 				1898	 
 Elias Lönnrots svenska skrifter	 			1908	 


If you want to know more about the Swedish Diachronic Corpus, the
following SweClarin reports may be of interest: 

SCR-03-2019
Towards a Swedish diachronic corpus: Intended content, structure and format of version 1.0
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/outline-swedish-corpus.pdf

SCR-02-2019
Swedish diachronic texts: Resources and user needs to consider in a Swedish diachronic corpus
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/swedish-historical-texts_3.pdf

SCR-01-2019
Characteristics of diachronic and historical corpora: Features to consider in a Swedish diachronic corpus
Eva Pettersson & Lars Borin
url: https://sweclarin.se/sites/sweclarin.se/files/diachronic-corpora-sweclarin-v3.pdf