The offer of the Transvaal having been accepted, it became necessary for that Colony to issue a proclamation, in which, _inter alia_, it was made known that, as it was "desirable in the interests of this Colony, that a Volunteer Corps, formed under the Volunteer Corps Ordinance, 1904, should be called out for service in this Colony, and in the said Colony of Natal," and as the Lieutenant-Governor of the Transvaal had "accepted the service of certain persons desiring to be formed into a Volunteer Corps," and such Corps had been lawfully formed and designated the First Transvaal Mounted Rifles, therefore the said Corps "shall be and is hereby required to serve within this Colony or in the said Colony of Natal." The formation of the corps, 500 strong, took effect as from 26th April. It was placed under the command of Lieut.-Col. William Frank Barker,[185] with Captain Walter Jardine as Adjutant. Great care was taken in the selection of the other officers, non-commissioned officers and men. It was decided to accept volunteers from several existing mounted volunteer corps, in order that each such unit should participate in the campaign. The corps was accordingly constituted as follows: W.O.'s, N.C.O.'s Officers. and Men A Squadron, Imperial Light Horse 7 99 B " South African Light Horse 5 87 C " Johannesburg Mounted Rifles and Scottish Horse 8 122 D " Northern, Eastern, and Western, Mounted Rifles 5 82 Maxim gun, Searchlight, Transport and Medical Detachments 4 15 Regimental Staff 4 5 -- -- 33 410 Hon. Capt. J. Peet, J.M.R., was appointed Quarter-master, and Lieut. W. Bruce, Western Mounted Rifles, Signalling Officer. The unit was mobilized on the 25th April, 1906. Notwithstanding the fact that many difficulties had to be contended with,[186] the T.M.R. left Johannesburg for Dundee, complete in every detail, on the 26th. The mobilization had been carried out in a most effective manner and with such speed by Colonel C.J. Briggs, Commandant of the Transvaal Volunteers, Major M.C. Rowland, Controller and Paymaster, also officers, n.c.o.'s and men connected with the supply of arms and equipment, clothing, transport, pay, etc., as well as Major J.W.F. Lamont, R.F.A., Chief Staff Officer, Transvaal Volunteers, that the corps was obliged for several days to await orders at Dundee. In addition to all the expenses being defrayed by the Transvaal Government, the corps drew all supplies, except rations in the field, from the Transvaal Volunteer Headquarters, Johannesburg. * * * * *