In a copyright claim, the test of originality which had to be passed was set out by Peterson J, saying: ‘The word ‘original’ does not in this connection mean that the work must be the expression of original or inventive thought. Copyright Acts are not concerned with the originality of ideas, but with the expression of thought, and, in the case of ‘literary work,’ with the expression of thought in print or writing. The originality which is required relates to the expression of the thought. But the Act does not require that the expression must be in an original or novel form, but that the work must not be copied from another work – that it should originate from the author. In the present case it was not suggested that any of the papers were copied. Professor Lodge and Mr Jackson proved that they had thought out the questions which they set, and that they made notes or memoranda for future questions and drew on those notes for the purposes of the questions which they set. The papers which they prepared originated from themselves, and were, within the meaning of the Act, original. It was said, however, that they drew upon the stock of knowledge common to mathematicians, and that the time spent in producing the questions was small. These cannot be the tests for determining whether copyright exists. If an author, for the purposes of copyright, must not draw on the stock of knowledge which is common to himself and others who are students of the same branch of learning, only those historians who discovered fresh historical facts could acquire copyright for their works.’
and ‘there remains the rough practical test that what is worth copying is primafacie worth protecting.’