The Griffiths maps contain numbers which correlate to the plot/house occupied by the head of household listed. The number is the column to the left of the person's name in the printed list of householders. It may simply be a digit, or it can be a digit and a letter in lower case typeface, usually in parenthesis. The map images are often hard to read, bur if you copy them off and scan them with a microscope you can usually see a pattern. Some maps are easier than others. Dungarvan Branch of the Waterford Library has these maps in a large format in hard copy. Sometimes older OS maps unrelated to Griffiths Survey will have small squares which represent houses. You can try and relate the two pieces of data. By the way, when you see a name with a digit and then a long series of letters, you may presume the persons are related. These groups are often representative of the older form of settlement in clusters. They can also be estate housing for laborers. Sheila MacAvoy Block