Biographical material, correspondence, photographs, awards material, sketches and/or illustrations, dummies, color separations, manuscripts, typescripts, galleys, proofs, paste-ups, photo negative, storyboard, blueprint, linoleum blocks, posters, woodcut, press sheet, sound recordings, and miscellaneous material. The Collection holds sketches and/or illustrations for Horatio (1969); Horatio goes to the country (1978); Horatio's birthday (1976); The house on Stink Alley (1977); How many miles to sundown? (1974); and I feel the same way (1967). There are dummies for Election day (1967); Express train to trouble (1981); First grade jitters (1982); Funny bunnies (1984); A gift for Lonny (1981); Giraffes at home (1972); Go tell Aunt Rhody (1973); Henry babysits (1983); Henry goes west (1982); Henry's awful mistake (1980); Here a plant, there a plant, everywhere a plant, plant (1982); Horatio goes to the country; Horatio's birthday; I don't want to go, I don't know how to act (1983); If I drove a bus (1973); If I drove a car (1971); If I drove a tractor (1973); and If I drove a train (1967. The Collection includes color separations for Express train to trouble; First grade jitters; Go tell Aunt Rhody; Here a plant, there a plant, everywhere a plant, plant; The holiday song book (1977); A home for Hopper (1971); Horatio; I don't want to go, I don't know how to act; If I drove a bus; and If I drove a train. There are typescripts for First grade jitters; The holiday song book; and I feel the same way, and proofs for Horatio. There are also galleys for I feel the same way. The Collection holds paste-ups for Engine number seven (1975) and Horatio solves a mystery (1980). There is also a storyboard and a blueprint for Engine number seven and linoleum blocks for Horatio.