RMS Leinster was an Irish ship operated by the City of Dublin Steam Packet Company. She served as the Kingstown-Holyhead mailboat until she was torpedoed and sunk by the German submarine UB-123, which was under the command of Oberleutnant zur See Robert Ramm, on 10 October 1918, while bound for Holyhead. She sank just outside Dublin Bay at a point 4 nautical miles (7.4 km) east of the Kish light.
Postcard image of the RMS Leinster
Leinster's Anchor – Carlisle Pier, Dún Laoghaire, adjacent to the National Maritime Museum.
Ninetieth anniversary of the sinking of RMS Leinster
Anchor of RMS Leinster, showing memorial plaques.
City of Dublin Steam Packet Company
The City of Dublin Steam Packet Company was a shipping line established in 1823. It served cross-channel routes between Britain and Ireland for over a century. For 70 of those years it transported the mail. It was 'wound-up' by a select committee of the House of Lords in 1922 and finally liquidated in 1930.
City of Dublin Steam Packet Company logo, still visible on a wall on Eden Quay.
RMS Prince Arthur of 1851, depicted in the book A Hundred Years by Post by J. Wilson Hyde.
90th anniversary of the sinking of RMS Leinster
The Ulster Paddle-Steamer launched at Birkenhead. Illustrated London News 1860
