 The period 1943 to 1944 saw the Rhodes/Nicholson complex being built, which is the Serengeti and Athi Houses complex today.The Sanatorium and School Hall were further constructed in 1945 as a sister school, the Duke of York school (today, Lenana School) was founded in 1948.Today the school, named after Kenya's capital, is one of the leading National Schools in the country.