13 Counsel for the respondent also relied on the very recent decision of this Court in R v Shannon,[6] in which the appellant had been sentenced to 18 months for possession of an unregistered firearm as a prohibited person. In substance it was argued that, as there was little distinction between that case and the present, it could not be said that a sentence of 18 months' imprisonment was outside the range for this category of offending. I do not agree. In Shannon, although there was no finding that the appellant's possession of the firearm was in furtherance of any criminal design, it was associated with other offending, and the appellant's personal circumstances were quite dissimilar to those of the appellant in the present case. There, the appellant also pleaded guilty to possession of two other prohibited weapons, a sword and a canister of mace, claiming that he had possession of all of these weapons for his protection and to fend off attackers. In that case the appellant had a terrible criminal record. He had some 90 prior convictions and had been in custody for approximately 17 of his last 20 years, which the court considered was relevant to the sentence which should be imposed. Not surprisingly, the appellant in that case had a poor work history. He had an emotionally disturbed personality and was diagnosed as suffering from an Attention Deficit Hyperactivity Disorder, bipolar disorder and substance abuse disorder. His conduct could only be appropriately controlled if he took prescribed medication. At the time of sentence for these offences, he was also completing a twelve-month sentence for other offences which had also been committed whilst he was in an unmedicated state.