Bit late now, I should have tipped on PRONI once get to a page of interest rather than trying to read the small central pane, right click and open in a new window, get full size (like on Ancestry).
Convenient that Drumanaquoile is right at the beginning of VAL/12/B/18/24A (1864-1878) at least
https://apps.proni.gov.uk/DCAL_PRONI_Val12b/Large%20JPeg/IRELBEL1D_032/IRELBEL1D_VAL12B-18-24A/IRELBEL1D_VAL12B-18-24A_M_00003.jpgIf change the final digit get previous page with John Connor junior on at map ref 15. The fact that 16 says Pat Connor (Walsh) and 17 Pat Connor (James) is to distinguish them. Also have Pat Connor (Ewd) at 20, who perhaps died 1873 & had a wife Rose and son Edward [named after his grandfather]. Have to turn to Civil deaths to confirm (not all deaths were registered and some changes are due to emigrations). People can have parcels of land in adjoining townlands sometimes one has the house + land and the other just land.
Pat Connor (Edw) at 20 died 1872 aged 68, but Charles Connor at 16 just got too old. Patrick (Walsh) seems to take over 16a, 16b & 17 and have the land revalued 1876 but Charles didn't die till 23 Dec 1878 (aged 80).
The maps on AskaboutIreland are later late 1870's but used as they are neatly printed in red rather than the scrawl of hand annotations on earlier ones. as the numbering tends not to change much in rural areas is fine + Co Down & Co Armagh were the last surveyed.
https://www.johngrenham.com/blog/2018/11/05/more-maps-than-you-can-shake-a-stick-atThe alternative ones & Town plans John mentions are only there for the Republic, PRONI has N.I.'s offline. AskaboutIreland is glitchy sometimes maps don't load for a particular Townland, can always open someone elsewhere and move the view.