Fiona,
If you want an overview of Killycarn, go to Griffiths Valuation site and click on Griffiths Places.
http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameSearch
Then enter Killycarn & Antrim. Click on occupants. You will see Clarke Robinson’s name there. Click on occupants. You will see Clarke Robinson listed on plot 7e. That was a house and garden. The farm itself was occupied by James Reid (plot 7a). It was a total of about 19 acres. So I know from these records that Clarke had a small house on James Reid’s farm. (Though Clarke's landlord was not the farmer but the O’Neill estate at Shane’s Castle, near Randalstown).
Next click on one of the 2 map views buttons. Enlarge the screen and focus on the red line up the middle of the red box. You should see Killycarn to the right hand side of the red line. If you then use the slider bar to switch to a modern map, you’ll see the modern Killycarn Rd running through the middle of the townland.
Now with most Griffiths on-line maps, the individual plots are shown, normally in red. In this particular map that hasn’t been done. For some reason, whoever compiled this area didn’t have access to those versions and so used blank maps instead. You can still use it to see where Killycarn is but you can’t tell where the houses were. However there are versions of the maps that do have that information shown. Both PRONI in Belfast and Ballymena library have copies with the Killycarn houses shown. Those copies are not on-line and so you would need to go in person (or get a researcher to do that) to find it. It’s quite hard on the eyes as the maps have been overwritten with other information but it can be done.
You might get lucky and find plot 7e, but in my experience of those particular maps, the best you’ll probably get is to find where plot 7 was/is. That should enable you to find it today, but unless the current farmer happens to know where the agricultural cottages stood (and they mostly don’t) then you may not get further than that. However you will be within a few hundred yards of where Clarke lived and that’s not too bad.
The area today is still farmland. Plot 7 is still likely to be a farm, but over the years the need for agricultural workers has diminished, due to mechanisation and other factors, and so the farm workers cottages have generally disappeared. I looked at the Valuation Revision records, which take the original Griffiths information forward to 1929. They show that by 1929, plot 7e was “land only” ie the cottage had gone. No longer required, it would have just collapsed or been cleared away by the farmer for other agricultural purposes.
https://www.nidirect.gov.uk/services/searching-valuation-revision-books
There are still a few agricultural cottages around. Unoccupied. I have attached a photo of one near where I live in Co Antrim, to give you a rough idea of what your ancestor’s would have looked like. (They tended to be fairly standard in design). The property in the photo is a row of 3 cottages. There were originally 4 but the end one has collapsed. In the photo there’s a tin roof but in the 1800s it would have been thatched. Bare earth floor, no running water, outside toilet, 2 rooms max. Heating from a turf (peat) fire. A small bit of land nearby to grow vegetables. Rent was often paid in kind ie an agreed number of days labour on the farm per year, after which the tenant was free to do whatever he or she wanted eg work on another farm or on government contracts such as road building. In this particular case the landlord wasn’t the farmer whose land the cottage was on but the O’Neills, so I suspect the rent was paid in cash, as they probably didn’t need the labour.
You mention googling for Killycarn. The place is very small and unlikely to come up on most searches. There’s not a lot there.
Finally, a note on the surname Robinson. In Ireland Robinson is also spelled Robertson. The 2 are interchangeable. That may seem bizarre today but it was quite common then. Other examples are Kilpatrick and Kirkpatrick, Connor & Nogher which amazingly are the same. People then weren’t bothered about having a single “correct” name and for various cultural and linguistic reasons there were many variants of names. So bear in mind that you might find some of your family recorded as Robertson as well as Robinson.
Robinson is very common in Co Antrim and is apparently of an English origin (according to John Grenham’s site). The distribution pattern shows the majority in Ulster (suggesting they were descendants of settlers who arrived from Scotland or England as a part of the Plantation of Ireland in the 1600s) but the spread also suggests some may be of Irish origins. (Though depending on how far back you want to go, they too might have originated in England). See: https://www.johngrenham.com/surnames/
If yours were in Antrim, statistically and geographically, that increases the chances of them being of English or Scottish origins but that is only speculation. I note that some of the other Robinsons in Killycarn were Presbyterian. So that tells you they are of Scottish origins. So if your family are connected to them (and they could well be. Farmers liked to stay put. They didn’t move around a lot). That part of Ireland was heavily settled by Scots, mostly in the 1600s. The majority were Presbyterian but just to make it a bit more confusing some were Roman Catholic. The first Earl of Antrim encouraged lots of his tenants from the Kintyre peninsula, and the islands of Islay & Jura in the Hebrides to move to his estates in north east Antrim in the 1500s (which then included Skerry). They were a mix of Presbyterian and RC, whereas most of the other Scots settlers were Presbyterian, so much so, that even today it remains the most common denomination in the county. If I were to be pressed, I’d guess your family probably originated in Scotland.