Luks’ influence, in the use of tonal harmonies rather than coloristic techinque and a dark palette, is evident in her early work. The broad brush strokes of the Ashcan School continued throughout her career, although her paintings became more impressionist and brighter from the mide 1940’s on. Carothers continued to paint until she was 90.Many of Carothers’ paintings were commissioned portraits which are privately owned throughout the United States. Public collections owning her work include the American Legion War Memorial in Paris,The University of Texas at Austin, The University of Wisconsin and Lehigh University.
In 1929-1930, Katherine entered into an agreement with Mansbendel to paint his portrait. The portrait which still hangs in the Mansbendel home features Peter in front of his carved mantle. In exchange, Peter carved a bed for her which featured her portrait. This bed is carved in walnut and it is a faithful example of Spanish Baroque style.