Tuff began with Magma. Set as text, they appear to be similar and are quite comfortable as typographic companions. The child-safe softness of Tuff owes something to the letterforms of the earliest extant Greek Manuscript, The Persae by Timotheos in the 4th Century BC. It is beholden to Morris Fuller Benton's original Souvenir, and its revival by Ed Benguiat. My own Stone Informal was also an influence.