|  | No information about this work is available, 
				except the fact that it shared some material with the fourth 
				movement of the 
				Third Symphony. When discussing that work with 
				Natalie Bauer-Lechner in the summer of 1899, Mahler talked about 
				the meaning of the third movement, and then continued (NBL 
				118;
				
				
				NBL2 136,
				 
				NBLE, 129–30): 
					
						
							| 
							Wie aus dem wirren Traum das Erwachen 
							– oder vielmehr ein leises 
							Sich-seiner-selbst-bewußt-werden – folgt das Adagio 
							darauf. Ich habe mich immer besonnen, woher ich das 
							Thema kenne; heute fällt mir ein, daß es aus einer 
							Komposition meiner Gymnasialzeit ist. Da standen die 
							ersten Takte ganz so da wie in dem '0 Mensch'; aber 
							darnach wurde es gleich trivial.  | 
							Like the moment of awakening after a 
							confused dream – or rather a gentle return to 
							consciousness of one's own reality – there now 
							follows the Adagio. I've always wondered how I came 
							to know the theme; today it came to me that it is 
							from a composition from my time at the Gymnasium. 
							The initial bars were there exactly as in 'O Mensch'; 
							but thereafter it was just trivial. |  This suggests 
					that the incorporation of the previously-composed material was the 
					result of an unconscious creative process. However it 
					remains unclear what type of work the source was, and it is 
					worth noting that Isabelle Werck (IWGM, 
					165) has drawn attention to the similarities between the 
					opening of the
					
					fourth movement of the Third Symphony and Das 
					klagende Lied (Part II in the 1880 version; Part I in 
					the published version).  |