Allgemeines Künstlerlexikon (AKL)
vol. XIX, 1998, p. 587 :

“ Twin brother of (the landscape-painter) Gustav Paul C. … Training to a xylographer with Messrs. Allgaier & Siegle in Stuttgart and 1859/60 with Brend’amour in Dusseldorf. Establishes in 1861 together with his colleague Ruff own xylographic institute in Stuttgart, whose exclusive owner he becomes in 1869 and

which develops into one of the most esteemed ones in Germany

(with temporarily up to 30 journeymen). C. is decisively involved in

that in this time the wood engraving

becomes an important practice of reproduction.

Art journeys together with the twin brother result not only in own wood engravings and small paintings, but

led to own painterly treatment of the engraving,

by whose technical brilliance

C. soon becomes one of the best of the profession.

After Cloß’ death the xylographic institute is taken over by his pupil Carl Staud (b. Stuttgart 1847).

For the general importance of the wood engraving see also Osteneck, (To the Xylographic Description in the 19^th Century), in Luneburg Contributions to the Research of the View, 1983, pp. 120 ff. + Hanebutt-Benz, (Studies to the German Wood Engraving in the 19^th Century), Frankfort on the Main 1984.