During the year 1843 the regiment remained at Newport.
1844
The regiment embarked by divisions at Newport, on the 8th and 16th of August, 1844, and disembarked at Kingstown, Dublin, on the 11th and 19th of that month. In December, the regiment moved from Richmond to the Royal Barracks at Dublin.
1845
Major-General Sir Robert Henry Dick, K.C.B., was appointed colonel of the SEVENTY-THIRD regiment on the 10th of June, 1845, in succession to Lieut.-General William George Lord Harris, K.C.H., deceased.
The service companies, under the command of Lieut.-Colonel Charles Jowett Vander Meulen, embarked at Cork in H.M. troop-ship “Apollo” on the 29th of September, 1845, for the Cape of Good Hope. In consequence, however, of political events in South America, they were required (together with the reserve battalion of the forty-fifth regiment) by the British minister at Rio Janeiro to proceed to the river Plate, and they were disembarked at Monte Video in January, 1846.
1846
On the 3rd of April, 1846, Major-General Sir John Grey, K.C.B., was appointed colonel of the SEVENTY-THIRD regiment, in succession to Major-General Sir Robert Henry Dick, K.C.B. and K.C.H., who was killed on the 10th of February, 1846, at the battle of Sobraon.
While the service companies were stationed at Monte Video, from January to July, 1846, they were employed in the protection of the town, and of the British merchants and inhabitants, against an Argentine force under General Oribe, who was investing the place.
1847