reason for laying out pavements is to ensure that the pedestrians are able to go about their daily affairs with a reasonable measure of safety and security. That facility, which has matured into a right of the pedestrians, cannot be set at naught by allowing encroachments to be made on the pavements. There is no substance in the argument advanced on behalf of the petitioners that the claim of the pavement dwellers to put up constructions on pavements and that of the pedestrians to make use of the pavements for passing and repassing, are competing claims and that, the former should be preferred to the latter. No one has the right to make use of a public property for a private purpose without the requisite authorisation and, therefore, it is erroneous to contend that the pavement dwellers have the right to encroach upon pavements by constructing dwellings thereon. Public streets, of which pavements form a part, are primarily dedicated for the purpose of passage and, even the pedestrians have but the limited right of using pavements for the purpose of passing and repassing. So long as a person does not transgress the limited purpose for which pavements are made, his use thereof is legitimate and lawful. But, if a person puts any public property to a use for which it is not intended and is not authorised so to use it, he becomes a trespasser. The common example which is cited in some of the English cases (see, for example, Hickman v. Maisey [(1900) 1 QB 752 : 1900 WN 72 (CA)] ) is that if a person, while using a highway for passage, sits down for a time to rest himself by the side of the road, he does not commit a trespass. But, if a person puts up a dwelling on the pavement, whatever may be the economic compulsions behind such an act, his user of the pavement would become unauthorised. As stated in Hickman [(1900) 1 QB 752 : 1900 WN 72 (CA)] it is not easy to draw an exact line between the legitimate user of a highway as a highway and the user which goes beyond the right conferred upon the public by its dedication. But, as in many other cases, it is not difficult to put cases well on one side of the line. Putting up a dwelling on the pavement is a case which is clearly on one side of the line showing that it is an act of trespass. Section 61 of the Bombay Municipal Corporation Act lays down the obligatory duties of the Corporation, under clause (d) of which, it is its duty to take measures for abatement, of all nuisances. The existence of dwellings on the pavements is unquestionably a source of nuisance to the public, at least for the reason that they are denied the use of
