sentences:  From the 1860s, ten boarding houses, each for up to sixty pupils, were added, greatly increasing the school's capacity.By 2020, the number of pupils had risen to 690.The school's traditions include a 600-year-old ceremony in which the Warden, wearing the Founder's Ring, admits each new Scholar; "Illumina", an autumn celebration, in which candles are placed into niches all over the medieval walls around the playing fields; and "Morning Hills", held once a year, when all the school's pupils and teachers climb St Catherine's Hill for a roll call and prayers.