do it," and Best J. said 1 :- A mandamus now will lie for the performance of any public duty." In R. v. Payn 2 Lord Denman C.J. observed :- I disclaim entering into the general merits of the case. It is enough that a public duty is left un- performed."
The first question in every case where a mandamus is sought is to inquire what is the public duty. If it be a single ministerial act not involving discretion, as the affixing a corporate seal, the Court may compel its performance specifically (per Lord Kenyon C.J. in R. v. Beeston 3 ). But if it be an act involving discre- tion the Court will only see that the discretion is exercised. Whatever the power is, that, and that alone, the Court enforces. The general principle applicable to this case is thus stated by Lord Cairns L.C. in Julius v. Lord Bishop of Oxford 4
Where a power is deposited with a public officer for the purpose of being used for the benefit of persons who are specific- ally pointed out, and with regard to whom a definition is supplied by the legislature of the conditions upon which they are entitled to call for its exereise, that power ought to be exercised, and the Court will require it to be exercised." I therefore examine the by-laws to ascertain the duty and its nature.
The persons are defined by the first by-law of Part VI., and the appellant is one of them. The conditions upon which the Council were bound to perform the duty of consideration were fulfilled, viz, written application and the officer's favourable opinion of the premises.
The duty is if the Council see fit," to cause the premises to be registered in a book. There is a consequential duty of a peremptory nature to grant a certificate of registration, but that is dependent on the prior fact of registration. The words are primarily permissive, namely, may
if the Council see fit but only in a certain sense. There is, first of all, an absolute duty to consider, then a discretionary power to decide one way or the other, and in the event of a determination in the applicant's favour there is again an absolute duty to register and afterwards to grant a certificate. Has there been any failure in the primary
12 B. &C., 584, at p. 596. 2A. &E., 392, at p. 399. 33 T.R., 592, at p. 594. 45 App. Cas., 214, at p. 225.