A little information from the sailing records I hold.
26 Officers, 1 Warrant Officer 938 Rank and File, 3 horses, 1 Maxim Gun and 2 carts of the 2nd Battalion, Scottish Rifles (Cameronians) embarked on No 15 troopship,the "City of Cambridge" on 23 October 1899 at Glasgow en route to Cape Town. They were brigaded under the 4th Infantry Brigade.
Further Reinforcement or Battle Casualty Replacement Drafts followed on:
16th February 1900: 3 officers and 113 rank and file from the Scottish Rifles (Volunteers) embarked from the Regimental Depot at Hamilton and sailed from Southampton on the Freighter "Gascon"
20th February 1900: 25 officers and 536 men, plus 5 horses from the 4th (Militia) Battalion, Scottish Rifles, embarked at Southampton on No 19 Transport Ship "Cephalonia"
17 March 1900: A draft of 2 Officers and 100 men of the 2nd Scottish Rifles travelled from their Barracks in Hamilton, Ayrshire, to Southampton where they embarked on board the Freighter "Gaika", bound for Cape Town.
07 June 1900: A draft of 2 officers and 300 rank and file from 2nd Battalion embarked at the Royal Albert Dock on No 86 troopship "Lake Erie" bound for Cape Town. Their Home station is shown as Lanark.
31st August 1900: A draft of 50 rank and file from 2nd Battalion embarked at Southampton from Lanark. They travelled on No 69 Troopship "Canada" via Queenstown in Ireland where they embarked Battalions from Irish Garrisons.