Well there was a 2IC Major General Brent Spencer you might find this list helpful
21 August
Wellesley's Corps at Vimeiro, on 21st August, stood as:
Commanding the force: Lieutenant General Sir Arthur Wellesley
Second-in-command: Major General Brent Spencer
Deputy Quarter Master General: Brevet Lieutenant Colonel James Bathurst
Deputy Adjutant General: Brevet Lieutenant Colonel George Tucker
Artillery: Lieutenant Colonel William Robe
1st Brigade: Major General Rowland Hill
1/5th Regiment
1/9th Regiment
1/38th Regiment
one Company, 5/60th Regiment
2nd Brigade Major General Ronald Ferguson
36th Regiment
1/40th Regiment
1/71st Regiment
one Company, 5/60th Regiment
3rd Brigade: Brigadier General Miles Nightingall
29th Regiment
1/82nd Regiment
one Company, 5/60th Regiment
4th Brigade: Brigadier General Barnard Bowes
1/6th Regiment
1/32nd Regiment
one Company, 5/60th Regiment
5th Brigade: Brigadier General James Catlin Craufurd
1/45th Regiment
1/91st Regiment
one Company, 5/60th Regiment
6th (or Light) Brigade: Brigadier General Henry Fane
1/50th Regiment
5 Companies, 5/60th Regiment
4 Companies 2/95th Regiment
7th Brigade: Brigadier General Robert Anstruther
2/9th Regiment
2/43rd Regiment
2/52nd Regiment
97th Regiment
8th Brigade: Brigadier General Wroth Palmer Acland
2nd Regiment
20th Regiment
2 Companies 1/95th Regiment
Unbrigaded: 20th Light Dragoons;
A General Order of 21st August, issued after the battle of Vimeiro, assigned the two companies of the 1/95th to the 6th Brigade and assigned one company 5/60th Regt each to the 7th and 8th Brigades, thus leaving only three companies with the 6th Brigade. On 21 August, Colonel John Harding arrived to command the artillery. A General Order of 22nd August transferred the 97th Regiment to the 8th Brigade.
On 22 August, Lieutenant General Dalrymple arrived and assumed command of the army. He immediately agreed to a suspension of hostilities and began to negotiate a convention for the withdrawal of French forces from Portugal, The Convention of Cintra. This was signed on the 29/30August. Also, on the 22nd, Dalrymple assigned most of the Vimeiro Corps to Wellesley's command and the recently arrived reinforcements, with perhaps Acland's and Anstruther's Brigades to Moore's command. Brigadier General C. Stewart arrived 23/24 August.