Town manager Jim Magilton confirmed his trial, saying: "Graham is someone we have been aware of for a while, he has impressed a lot of people in Ireland and Charlie Woods watched him play at the back for Ireland B alongside Alex Bruce.
"When the unfortunate situation came up with Drogheda, we asked Graham over for a trial.
"He spent a few days with us last week and did very well. He showed a great attitude. He had a look at us, we had a look at him but that's as far as it's gone at the moment."
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