| Reference Number | WJTS/1/27 |
| Title | 23 - Population age in 1861 |
| Date | [1910s] |
| Creator Name | Mason, Thomas Holmes, 1877-1958 |
| Thompson, Sir William John, 1861-1929 |
| Description | Glass lantern slide showing a table giving the number of males and females by age, from 35 to 55 years, in Ireland in the year 1861 |
| Extent | 1 slide |
| Term | Censuses |
| Population Characteristics |