As an interesting detour, and for a fun scramble down a steep incline, if one walks from Knockbrack east south east towards Knockanganuish, staying to the south of the valley through which the river from Lough Nambrackdarrig runs (is this the Ullauns River? Think it's noted as such in McGonigle's Guide to the Killarney outback) there is a ridge which leads to an area containing forestry. When you find the forestry at V935773 F turn south and follow its north east boundary. After about 10 minutes walk (maybe 25 mins from Knockrower summit) you will find a stream beside an area of forestry that looks like it was burned in recent years. Stay as close to that stream as possible, even though the going can be sticky and boggy - it becomes a spectacular waterfall dropping about 100m through the forestry, and great fun can be had scrambling down beside it. Rocks in it are very slippy though, so take care or you'll end up on your seat. At the bottom, there is a path which takes you back to a track at at V925770 G, and eventually back to a tarred road near the Old Killarney Road. Linkback: https://mountainviews.ie/summit/255/comment/3741/