sentences:  Although active as a floriculturist, Spinks made no known lasting contributions to that field.Spinks's variety of avocado, "Persea americana" 'Spinks', was developed by him at his Duarte ranch between 1910 and 1920.In 1920, Spinks provided a supply of his avocados for a University of California at Berkeley and California Avocado Association comparison of avocado strains.