8 By par2, it is also pleaded, as particulars of publication, that the letter was published to some hundreds of medical practitioners throughout Tasmania. I will assume, for the purpose of determining the question of law, that the reference in the letter to "some of our colleagues" was a reference which included the plaintiffs. The letter referred to publicity from "some of our colleagues" regarding treatment for short-sightedness and other refractive anomalies with laser surgery. I must assume from what is pleaded, that the plaintiffs, who prima facie were colleagues of the ophthalmologists who worked for the first defendant, had in or about September 1997 written to all ophthalmologists practising in Tasmania to advise that they had recently purchased a laser for carrying out Excimer eye treatment, seeking referrals of patients for such treatment and had, at a material time, by newspaper advertisements, published information regarding treatment for short-sightedness and other refractive anomalies with laser surgery. I cannot assume that the September 1997 missive contained any advice other than that which I have stated and I have no knowledge concerning the detail of the information published by the plaintiffs in the newspaper advertisements, other than that it concerned treatment for short-sightedness and other refractive anomalies with laser surgery. I will also assume that the reference to "the facilities and practitioners involved in both PRK and Lasik treatments" was a reference to a class of ophthalmologists, in Tasmania and outside Tasmania, and that the plaintiffs were members of that class. The number of ophthalmologists in that class is unknown. It could be considerable, I do not know.