 Complete the following phrase:  After the publication of Captain Sam Grant 1950 by historian and biographer Lloyd Lewis, Catton wrote the second and third volumes of this trilogy, making extensive use of Lewiss historical research, provided by his widow, Kathryn Lewis, who personally selected Catton to continue her husbands work. In Grant Moves South 1960, Catton discussed the increasing experience of Grant as a military commander, from victories at the 