Let's ask Cougar. He seems to have the Emerald Isle covered pretty thoroughly. And German so-called covert ops in general.
Ah yes. This would be the landing of Walter Simon on the Dingle coast. As far as I know he was the only agent landed that night of June 12-13 but Wilhelm Preetz was also landed in Ireland in June after Simon so this source may just be combining the two. This is actually a funny story so thank you for reminding me to revisit the escapades of the Abwehr on the Emerald Isle.
Simon was dropped off with the mission of setting up a weather reporting station and also to monitor British shipping in the Channel between Ireland and Britain. He had actually been on missions to Britain before the war running afoul of the Aliens Registration act in 1938 and spending 3 months in jail before being deported.
Like the account on Hermann Görtz, Simon was also dropped into Ireland unsuited for the task. The maps he was provided with were obsolete and upon reaching Dingle he immediately raised suspicion of himself when he asked workmen near the Dingle railway what time he could expect the next train to Dublin. The workmen informed him that he would have a long wait since the last train that ran on that track had passed fourteen years ago.
From there Simon wandered to the local pub in Dingle and proceeded to get drunk as he waited for a bus out of Dingle, and followed up by continuing to drink on the bus itself. Arriving at Tralee, the now smashed Simon boarded a train to Dublin and asked two men boarding the train with him if they knew anyone in the IRA.
The men turned out to be two plain-clothes detectives who phoned ahead to Dublin where Simon was picked up as he exited the train. On his person they found a paper bag that had several thousand English Pounds as well as American Dollars. He was incarcerated for the duration of the war.
Clearly Irish eyes were not smiling on the amadán bocht.