Gregg Wesley Toland, A.S.C. (May 29, 1904 – September 28, 1948) was an American cinematographer known for his innovative use of techniques such as deep focus, examples of which can be found in his work on Orson Welles' Citizen Kane (1941), William Wyler's The Best Years of Our Lives (1946), and John Ford's The Grapes of Wrath, and The Long Voyage Home (both, 1940).
The curse was the result of Cain murdering his brother, Abel, and lying about the murder to God. When Cain spilled his brother's blood, the earth became cursed as soon as the blood hit the ground. In a sense, the earth was left "drinking Abel's blood". Genesis 4:12 gives a two-part sentencing for Cain's curse.