This morning I stumbled onto a new (to me) website--The Delaney Archive. On the homepage, they describe the organization as caring for, "the archival collections of the Roman Catholic Diocese of Kildare & Leighlin, the Patrician Brothers, Brigidine Sisters, and Carlow College". The photographic collection is online at Flickr. A large portion of the material is from Carlow and Kildare Counties, home to my McGarr and Hore families.
The photo collection is searchable by clicking on "Photo Collection on Flickr" and then the magnifying glass on the right top of the images. It took me awhile to figure this out, so
I'm providing you with a red arrow. Those icons throw me every time.
There are tons of photos on the site, some of which are memorial cards, and while you probably won't find a direct ancestor since many photos are of Priests and Nuns, I did find several Priests who would have been my ancestor's confessors. It could also be useful if any past relatives were members of the clergy. There are pictures of some towns, and also letters and drawings. There's alot here so if you have time, don't just search and view only the results, it's an interesting glimpse of Catholic Ireland.