the holding is about a quarter of an acre - I can't see that reference on the map (at least in my photo'd copy - it might just be clearer in the original but I'm away from those - the Manx Museum is best choice here) - there is a small enclosure shown about midway along road from Grenaby northwards towards Kerrowkeil approx grid ref SC 263731 - however in 1841 census a Wm Quayle is shown at Grenaby Mill - such a small holding would correspond to a Mill and it is possible that Woods didn't number it on the plan as the number would need be larger than the plot on the map! - if so then the mill is in the village on the silverburn and I'm currently looking at a very detailed oil painting done in late 19th C of Grenaby Mill and joiner's shop hanging on my wall!