There was some apprehension as to what the men's reaction would be, but in the event only sepoy refused to wear a cap on religious grounds, which he continued to do even after being told by the regimental 'gooroo' that the cap was acceptable.
Brasyer does not make it clear whether he is referring to shakoes or forage caps, but if it was the former, they would have been replaced by the latter in pretty short order anyway.
The white cap cover is worn by the native infantry, the number is to be placed outside it, so as to be visible.'' Shakoes continued to be worn in the Madras and Bombay Presidencies and, it would seem, in many of the local contingents sponsored by the Bengal Army, including the infantry regiments of the Gwalior Contingent and those of the Oudh Irregular Force.
At the second relief of Lucknow, HM 93rd Highlanders locked horns with sepoys wearing red coatees, dhotis and shakoes.
Note that in addition to the Bengal Native Infantry and Light Infantry regiments there were also many Bengal 'Local Infantry' Regiments and a number of 'Irregular Contingents', some of which also participated in the Mutiny. The pouch was actually worn over the right buttock, from a belt slung over the left shoulder.
See the organization page for a listing and breakdown. By 1857 the bayonet had moved onto "The head-dress for the native infantry of the line is henceforth to be a dark blue Kilmarnock cap, encircled by a white band (woven in the cap) with the number of the regiment in front; the numbers to be one inch and a half long.
The everyday headdress of the sowar was a dark blue forage cap, rather wider in the crown than the Kilmarnock adopted by the infantry and artillery.
In vindication of this there are British intelligence reports from spies reporting in at Agra that state that those Sikh sepoys which had gone to Delhi with the mutinous BNI regiments eventually detached themselves from their parent regiments to form two exclusively Sikh battalions.
These men were almost certainly from one of the regiments of Oude Irregular Infantry, as the same 93rd officer who describes the enemy's uniform specifically identifies an Oudh regiment in a subsequent paragraph of his account.
In the aftermath of the Anglo-Sikh Wars each of the Bengal Native Infantry regiments was required to admit a hundred or so Sikh recruits, giving a Sikh component of around 10% per BNI.
It is certain that the regiment was not wearing the formerly worn off-duty.
This may well have been something of a leadership masterstroke, serving to draw a very distinct line between his own men and the treacherous 6th Bengal Native Infantry, which was also based at Allahabad and had just inflicted a heavy slaughter on its officers.