Lieutenant-General Lord Tyrawley, after commanding the regiment nearly four years, was removed to the Colonelcy of the Second Troop of Horse Grenadier Guards, and the command of the FIFTH HORSE was conferred on Colonel John Brown from the Ninth Dragoons, his commission bearing date the 1st of April, 1743. [Sidenote: 1744] In the beginning of the following year another draft of men and horses was sent on foreign service. [Sidenote: 1745] In April, 1745, the regiment was reviewed at Maryborough by Major-General de Grangues; and after the rebellion headed by Charles Edward, eldest son of the Pretender, broke out in Scotland, this regiment was ordered to Dublin, and the army in Ireland was placed in dispersed cantonments near the coast to resist any descent which might be attempted upon the island. [Sidenote: 1746] After the suppression of the rebellion in Scotland, three of the four regiments of _Horse_ in England were reduced to the quality of _Dragoons_ (25th December, 1746), and styled _Dragoon Guards_, and this regiment obtained the designation of the FIRST IRISH HORSE. The regiments of horse on the Irish establishment (now the 4th, 5th, 6th, and 7th Dragoon Guards) were frequently designated by the colour of their facings; the FIRST being frequently called the _Blue Horse_; the _Second_ the _Green Horse_; the _Third_, the _Carabiniers_; and the _Fourth_ the _Black Horse_. [Sidenote: 1748] A treaty of peace was concluded with France and Bavaria at Aix-la-Chapelle in the winter of 1748-9; and, while the negociations were in progress, the establishment of the FIRST IRISH HORSE (with that of all other regiments of horse and dragoons in Ireland) was reduced to twenty-one private men per troop. [Sidenote: 1751] On the 1st of July, 1751, a warrant was issued under the sign-manual, regulating the uniform, colours, and standards of the regiments of the line, from which the following particulars are extracted respecting the FIRST IRISH HORSE. HATS--Ornamented with silver lace, and a black cockade. COATS--Scarlet, faced and lappelled with pale blue, button-holes worked with white, white metal buttons set on two and two, and a long slash pocket in each skirt. WAISTCOATS AND BREECHES--Pale blue. CLOAKS--Red, lined with pale blue, and the buttons set on two and two, on white frogs, or loops. HORSE FURNITURE--Pale blue, with a border of broad white mohair lace, having a scarlet stripe down the centre, and I/H embroidered on a red ground, within a wreath of roses and thistles, on each holster-cap and on each corner of the housing.