sentences:  In 1799, John Fuller built a mansion called Effingham Hill House on the site of another house which had been called Tibs, and this house now forms the centre of the senior school, and has been extended to provide modern facilities.In 1886 or somewhat later, Julius Caesar Czarnikow bought Effingham Hill House from Frederick Augustus Maxse, and owned it until he died in 1909.His daughter, Ada Louisa, sold it to Azalea Caroline Keyes, who in 1916 sold it to Robert Reitmeyer Calburn, who owned it until 1928.