Which one of the following has not been mentioned in the definition of “Documents” as the means by which any matter is expressed or described upon any substance?

Section 3 of the Evidence Act defines 'document' as any matter expressed or described upon any substance by means of letters, figures, or marks. The Act enumerates letters, figures, and marks explicitly but does not mention symbols as a separate category. While symbols might conceivably fall within a broad interpretation, the statutory definition specifically lists only letters, figures, and marks. Option C is correct because 'symbols' is not explicitly mentioned in the definition.