His work was published in the New York Ledger, The Flag of Our Union, The Weekly Novelette, Gleason's Pictorial Drawing-Room Companion, and elsewhere.
Frederick Gleason published Cobb's first story, "The Prophet of the Bohmer Wald: a Tale of the Time of Joseph II, Emperor of Germany" in The Flag of Our Union.
As he summed up his work he wrote in the 31 years that he contributed to the New York Ledger 89,544 large pages of manuscript.
"[9] His "stories were reprinted many times by other publishers including Street & Smith (Columbia Library); Beadle & Adams; Frederic A. Brady; Elliott, Thomes & Talbot; George W. Studley; Ogilvie (Detective Series); and Donahue (Flashlight Detective Series).
"Mr. Cobb amassed a large fortune by his pen, and built himself a handsome house at Hyde Park.