Complex sentence: Rev. Archibald "Archie" Eneas Robertson (Helensburgh, 1870-1958), was a Church of Scotland minister who in 1901 the first mountainer to "bag" all of Sir Hugh Munro, 4th Baronet's 283 peaks over 3,000 feet.
Split into simpler sentences: Rev. Archibald "Archie" Eneas Robertson (Helensburgh, 1870-1958), was a Church of Scotland minister. He is generally regarded in 1901 as being the first mountainer to "bag" all of Sir Hugh Munro, 4th Baronet's 283 peaks over 3,000 feet.