(1829–1896) spent the summer of 1853 together at Glenfinlas in the Trossachs. Millais started a painting of John Ruskin during the visit, which he finished the following year. The painting is held in a private collection, but was on show at an exhibition on the Pre-Raphaelites at Tate Britain in London during 2004. John Ruskin himself was especially interested in the rock formations in the area and undertook his own studies of these. The Trossachs Hotel was built on the north bank of Loch Achray in response to the growing number of tourists visiting the region. The building now functions as the Tigh Mor Trossachs holiday apartments, owned by the Holiday Property Bond (HPB). In 1859, a dam was built at the eastern end of Loch Katrine and connecting aqueducts were added to as part of a new main water supply to Glasgow. At the expense of the Glasgow water company, Queen Victoria had a holiday house built overlooking the loch. The queen never stayed in the house, named Royal Cottage, as the windows were broken by the 21-gun salute that welcomed her, and the cottage later became accommodation for the employees of Scottish Water. Nature and conservation The forests of the Trossachs comprise both areas of ancient, semi-natural and traditionally managed woodland alongside commercial forestry plantations. The native woodland is largely deciduous, whilst the commercial forestry consists mostly of conifers. Fauna found in the woods of the Trossachs include black grouse, capercaillie and goshawk; mammal species include red and roe deer, red squirrel and pine marten. Beavers are also now present in the area, with signs of beaver activity being observed on Loch Achray during a survey undertaken over the winter of 2017–18; the beavers are assumed to have spread there from the existing population on the River Tay. Species of fish found in the lochs of the Trossachs include brown trout, perch and pike, and the lochs are also a habitat for osprey and otter. Arctic char are known to have lived in Loch Venachar and Loch Achray, but as of 2006 it was believed that they were no longer present. The more farmed areas of the Trossachs provide areas of marshland that are habitat for wildfowl and waders, with both wintering and breeding species recorded. In 2011 the pearl-bordered fritillary butterfly - a species considered rare in Britain - was found to be living around Loch Katrine,