Ben Nevis the summit only to find "fragments of earthen and glass ware, chicken bones, corks, and bits of paper". It was not until 1847 that Ben Nevis was confirmed by the Ordnance Survey as the highest mountain in Britain and Ireland, ahead of its rival Ben Macdhui. The summit observatory was built in the summer of 1883, and would remain in operation for 21 years. The first path to the summit was built at the same time as the observatory and was designed to allow ponies to carry up supplies, with a maximum gradient of one in five. The opening of
Ben Nevis the path and the observatory made the ascent of the Ben increasingly popular, all the more so after the arrival of the West Highland Railway in Fort William in 1894. Around this time the first of several proposals was made for a rack railway to the summit, none of which came to fruition. In 2000, the Ben Nevis Estate, comprising all of the south side of the mountain including the summit, was bought by the Scottish conservation charity the John Muir Trust. In 2016, the height of Ben Nevis was officially remeasured to be 1344.527m by Ordnance Survey. The height