1748, under the headmastership of the Revd Simpson, school numbers dropped from 'a great many scholars' to only four boys. Simpson resigned and was replaced by Edward Holme, a distant relative of Sir Richard Burton. By 1778 there were around 60 pupils, and the same is indicated in the School Inquiry Commission of 1868. In 1884 the governors appointed Daniel Birkett as headmaster. It was Birkett's vision to elevate the school's status to that of a First Grade Classical School. He started this revolution, reducing the number of free places to the townfolk and expanding boarding. When he resigned in the 1890s the school had over 100 boys. Birkett's revolution was continued by George Heslop who increased the size to a peak of 134 boys, although numbers dropped towards the end of the First World War (during which 350 Old Sennockians enlisted). Geoffrey Garrod followed Heslop in 1919. In the same year, the headmaster's wife, Mrs Garrod, started a new school for younger boys; Sevenoaks Prep School started with six pupils in the school Cottage Block. An element of selection entered the admissions process in the early 1920s. James Higgs-Walker succeeded Garrod in 1924. Higgs-Walker, or "Jimmy" as he was known by the boys, started a revolution at the school with the introduction of day houses, the expansion of school sports and extracurricular activities and the vast expansion of the school with the help of the school's greatest benefactor since the founder, Charles Plumptre Johnson (or C.P.J.), who served as a governor from 1913 to 1923 and chairman from 1923 to his death in 1938. Johnson donated many gifts to the school with his brother, Edward: *The Flagpole, 1924, *Thornhill, 1924 (Johnson's House), *Johnson's Hall, 1936 (Now Johnson's Library), *The Sanitorium, 1938, *Park Grange and the surrounding estate, 1946 Higgs-Walker led the school until 1956 when he was succeeded by Kim Taylor. Taylor's headship was something of a 'golden age', when the school became more prominent nationally through Taylor's introduction of a number of innovative teaching methodologies, "Mr. Taylor, the Headmaster, has built so successfully on the work of his predecessor that in the ten years he has been at Sevenoaks it has changed from an old-established minor public school ... into an experimental outpost of the Headmasters' Conference." The school was a pioneer in the introduction of 'The New Maths', an approach to teaching the subject which made it