By nine o'clock the police were withdrawn, all disturbance being at an end. In the course of the day forty-nine policemen were reported hurt, and on the other side seventy-two persons were taken into custody and removed to Vine Street Police Station, ten of them being charged with felony, and the remaining sixty-two with riotous conduct or with assaults on the police. Unfortunately the accommodation at Vine Street was altogether insufficient for such a large number of prisoners, the cells ordinarily in use were soon filled, and then recourse was had to an underground room, formerly the place of confinement attached to the old parish watch-house. Into this prison, which was dark and badly ventilated, were crowded forty-three persons, ten of whom were subsequently removed, but the remaining thirty-three had to spend the night (which happened to be unusually sultry), standing up, or lying on the damp floor as best they could. Many of the prisoners were respectable people, unused to dirt and discomfort, and their sufferings must have been considerable.

The Inspector in charge of the Vine Street Station, somewhat tardily communicating with Sir Richard Mayne, informed him of the overcrowded state of the cells, with the result that thirty-one prisoners out of the original seventy-two were removed to neighbouring stations by order of the Chief Commissioner. In the course of the next two days, all the accused were brought before the magistrates, when twenty-nine, or nearly half the number, were discharged, the remainder being fined or sentenced to short terms of imprisonment.

The conduct of the police in Hyde Park, and the treatment of the prisoners at Vine Street, having given rise to serious allegations and to much adverse comment in the public press, the Government decided to hold an inquiry into the matter. Three Commissioners were appointed, and given full powers to investigate and report upon the occurrences of the 1st of July and the following days. In the course of the inquiry, several attempts were made to discredit Sir Richard Mayne; some accused him of slackness for not personally directing the police in the park, whilst others held that he was over-officious in not leaving the crowd alone altogether. The responsibility for the overcrowding at Vine Street was laid to his charge, and it was suggested that he failed in his duty, in that he did not go to the police station, and, by virtue of the powers vested in him as a Justice of the Peace, admit to bail those prisoners who were not charged with felony, and who might be able to find sufficient guarantee for their future appearance.

Of these charges, which were made by people who seemed to think that any stone was good enough to throw at the chief officer of police, the two first, when taken together, were mutually destructive, besides being silly when considered separately; whilst the suggestion that Sir Richard Mayne ought to have admitted certain of the accused to bail, was not to the point, because it had been clearly laid down by Statute when the office was first created, that any exercise of the powers of a Justice by the Chief Commissioner of Police was to be strictly confined to his duties connected with the preservation of the peace.

The net result of the labours of Her Majesty's Commissioners was to establish, beyond a doubt, that certain constables had been guilty of unnecessary violence; that the Superintendent in charge, losing his head, or his temper, or both, had authorized stronger measures than the circumstances of the case warranted; and that blame attached to the authorities at Vine Street for the mismanagement which caused the detention of a far larger number of prisoners than there was accommodation for at that station. On the other hand, it was proved that the large majority of the police had acted with moderation and good temper throughout a long and trying day in spite of the continued attempts of the crowd to harass and annoy them; and that the measures adopted for the preservation of the peace had on the whole been successful, in so far that a mob many thousands strong, bent on mischief, had been effectually controlled and prevented from doing any material damage worth mentioning.

From the evidence as a whole, it is clear that the accusing witnesses (and they were very numerous,), must have been guilty of much exaggeration when describing the violence with which they said the police had acted; since in a conflict lasting several hours, in which it was alleged the constabulary used their truncheons unmercifully, sparing neither age nor sex, no life was lost, no limb was broken, nor was any permanent injury inflicted. On the other hand, many witnesses voluntarily came forward to testify to the good behaviour of the police, not only on this particular occasion, but generally in all their dealings with the public.

The promptitude with which the inquiry was granted, and the thorough and impartial manner in which it was carried out, was attended by the happiest results, and did much to foster friendly relations in the future between police and public; the latter were reassured that Government would not tolerate, much less countenance, any excesses committed by the police, upon whom again it was impressed that even a disorderly mob must be treated with a certain amount of consideration, and that high-handed interference would lead to the punishment of the offending constables.

A minor improvement which originated from this inquiry may, in passing, be noticed. Hitherto a constable's number had been surrounded by a scroll of embroidery that made it difficult to decipher except at very close quarters, so that identification was often rendered impossible: to rectify this, the plain metal figures now worn by constables on collar and helmet were introduced.

The Sunday-Trading Bill riots were quite unimportant as riots, and yet their influence upon the future of the police was very great, because the inquiry which followed illuminated a question that had been obscured by ignorance and prejudice, causing misconceptions to be removed on both sides, and a better understanding and mutual appreciation to be substituted, with the result that the metropolitan force soon began to be popular in quarters where it had previously been hated. The best proof of its efficiency, so far as the management of crowds is concerned, may be found in the fact that, during the first forty years of its existence, the peace was so well maintained, that the damage done to property by rioters was quite insignificant, and this without the intervention of the military; whilst in witness of the moderation of the methods employed by the police in the attainment of this result, it need only be stated, that in every conflict which occurred during the same period, the personal injuries sustained by the aggressors were invariably less severe than those suffered by the constables, though the latter were all men of exceptionally fine physique, and were armed with truncheons. In the course of the Reform riot which took place in Hyde Park in the year 1868, two hundred and sixty-five policemen were wounded out of a total of 1613 actually on duty, "and one Superintendent, two Inspectors, nine sergeants, and thirty-three constables were so severely injured as to be rendered unfit for duty, many for life," yet "the police behaved with the most admirable moderation and not a single case of unnecessary violence was proved against them."[219]

There is a saying that the strength of the Man in Blue lies in the fact that he has the Man in Red behind him. This of course is superficially true, in so far that in the event of a riot or other disturbance, with which the local police is for any reason unable to cope, a sufficient number of troops will be called out to assist the civil arm. But the saying is not true if any suggestion of an offensive alliance between constabulary and soldiery is intended; nor is it true if it is meant to give the impression that there is a potentiality of physical force behind the policeman, which, under any circumstances whatever, could be exerted to coerce the nation at large.