So, here are the final answers to my question “which of these places or buildings would have been visible in 1850?”
Starting with the Brackendale estate and a large stand of pine trees. In 1850, this land was still part of the very large estate owned by Captain Raleigh Knight. It was sold in 1869 to a General Byrne and, in 1892 he decided to split the land into four parts, one of which was the ‘Brackendale Estate’ which was to be sold for ‘development’. Adverts were placed in 1898 and there was even a brochure produced by Sadler and Baker, the estate agents describing how aristocratic were some of the owners of large houses in the district!
Now to the Brompton Sanatorium (now the Ridgewood Centre) on the edge of Frimley. Although tuberculosis was quite definitely a killer in the 1850s, it wasn’t until 1900 that the Brompton Hospital in London bought 20 acres of land on Chobham Ridges, then considered to be a particularly healthy part of the country. The Prince of Wales performed the opening ceremony in 1904 but there were problems with the drains (?) among other matters and the first patients didn’t arrive until 1907.
Now we get to the Good Old Duke of York hotel – now, sadly no longer with us. This was definitely to be seen in 1850, having been opened in 1816, to serve the families of the cadets at the Royal Military Academy opposite.
And what of the Globe/Dolphin on the London Road, soon also to be demolished? The earliest licensee in Ken Clarke’s book ‘Time Gentlemen Please’ is in 1861, so this would miss our 1850 deadline. However, this particular building would miss it by a mile as the Globe moved to new premises in 1938. The previous building was round the corner at the end of the Avenue where the Jehovah Witness Hall is now.
So we come to my assorted views postcard, with the appealing kitten. I am afraid this is a bit of a trick question! The picture postcard itself didn’t appear anywhere until 1870, during the Franco-Prussian War and it wasn’t until 1894 that publishers in the UK were allowed by the Post Office to sell cards with photos to go through the post without an envelope.