 He owned Gun Bluff Plantation on Edisto Island and engaged in agriculture issues of the state.For several years, Seabrook was the president of the South Carolina Agricultural Society and he stressed the need upon the farmers of the state for diversification of crop.In addition, Seabrook wrote the "History of the Cotton Plant" and "A concise view of the critical situation, and future prospects of the slave-holding states, in relation to their coloured population".