Thank you very much for your replies.
I was referring to this part. Now that 'travellers' has been mentioned, I can't see anything other than 'travellers'!
The story of this family is that after they were married, they had a child baptised in Belfast in 1855, then another in 1860 at the same St Patricks in Belfast but one was baptised in Dublin St Nicholas (without). They were on the Glasgow 1871 census and had two children whilst they were there. The whole family then moved to Springfield, MA in the USA - apart from my g.g.granddad who stayed in Scotland. However his poor relief form showed that he spent 7 months in America, probably visiting the family.
The family went on to do quite well in America, but my g.g.grandfather didn't fair so well and died of TB at 30 in Govan poorhouse. His children were in and out of the poorhouse after his death.
Am I correct in thinking that the marriage is supposed to in the bride's hometown? It would also make sense that the Langan's are there as witnesses/sponsors.
Enc - an example from a few pages down. It think it does say travellers.