Hi Carol, just to add another couple of links that may nail this for you
If you go to the Royal Commission of Ancient and Historical Monuments of Wales and use their mapping tool
http://map.coflein.gov.uk/ and zoom into Forest Lodge. You will notice a red dot on the property and if you use the 'select area' tool that looks like a broken dotted square, you will see that the property is described as follows;
FOREST LODGE;LOSCOED, LIBANUS
Site Description
Forest Lodge is a large farmhouse situated just south of the minor road running south of the A4215 at the foot of Fan Frynych, 3km east of Heol Senni. It was the centre of the 650 hectare Forest Lodge Estate, which was one of the largest enclosed farms in Powys, and is now within the Brecon Beacons National Park.
There is a large, whitewashed farmhouse with a pitched slate roof, built in the early nineteenth century. The huge barns had a waterwheel attached to drive threshing and corn-grinding machinery, the millstones remain on site. Other ranges of buildings inlcude a manager's house and a courtyard of workers' houses that were enlarged in the later nineteenth century. The mill dam also remains.
Also, if you search the old maps site
http://www.old-maps.co.uk , the 1887 map says Forest Lodge and underneath in brackets -Losgoed
hope this helps a bit more
Margaret