Simplify the following text for a Grade 6 native English-speaking person.
Original: In his second - to - last year at Winchester , he was introduced to rock climbing and mountaineering by a master , R.L.G Irving , who took a small number of pupils climbing in the Alps every year .
Simplified: In his final year there , he was introduced to rock climbing and mountaineering by a master , R. L. G. Irving , who took a small number of people climbing in the Alps each year .