The judgment was given against the son only. Because of the nature of the other matters dealt with in my judgment final orders were not made immediately. However, in April 2000, on the mother's application, I formally gave judgment against the son for $26,662.21 "in respect of the claim referred to in [23]" of my judgment. At that time it was agreed that that was the appropriate sum to encompass the $17,000 together with interest as outlined in [23]. Mr Sanderson of counsel had only recently taken the brief for the son and the daughter in law, which had previously been held by Mr P P O'Loughlin of counsel. Mr Sanderson has subsequently made application on the son's behalf for the judgment entered to be corrected under the slip rule. He says that by reason of his inadvertence, owing to his unfamiliarity with the matter, he agreed to entry of judgment in the sum mentioned as including the appropriate amount of interest because he had not at that stage examined the evidence in the case to determine the date on which demand had been made and from which, therefore, interest ought run. He says that upon examination of the evidence it became apparent that interest had been calculated from a date earlier than the first demand and, as interest was to run only from demand, the "slip" in the judgment ought be corrected and the sum for which judgment was entered reduced accordingly.
2 The original claim for the $17,000 was contained in paragraphs 8, 9 and 10 of the cross claim. Those paragraphs simply allege that on 11 December 1992 the cross claimant lent the cross defendants $17,000 for one year and that the $17,000 had not been repaid. By prayers 3 and 4 the cross claimant sought an order for the payment of $17,000 and "interest". There was evidence at the trial that demand was made for the repayment of the $17,000 by letter on 23 December 1996. In essence the question as to the time from which interest should run was not the subject of submissions in the proceedings prior to the delivery of my judgment. I do not have transcript for the occasion on 26 April 2000 when I gave judgment for the $17,000. My notebook confirms that this was the first occasion on which Mr Sanderson appeared before me, Mr O'Loughlin having last appeared on 26 February 2000. However, I am clear that no submission was made to me concerning the calculation of interest nor, indeed, anything said on that day about the basis of calculation of interest. Mr Sanderson, as he concedes, clearly consented to entry of judgment in the form to which I have referred consequent upon [23] of my judgment. It was stated in submissions by Mr Sanderson on this application that the interest included in the order of 26 April 2000 was calculated from a date in 1994 which was selected by the mother's solicitor. This proposition is not contested on behalf of the mother. It is said by Mr Sanderson that the evidence showed that the first demand, being the letter dated 23 December 1996 referred to above, demanded payment within seven days, so that the date from which interest should have been calculated in accordance with [23] of my judgment was 30 December 1996. It is asked that the judgment be adjusted by a reduction of the sum so as to include only interest calculated from that date.
3 It is the law (commonly known as "the slip rule") that, even where a judgment has been entered, the Court may correct the judgment if it contains an error caused by mistake or inadvertence. The rule is now embodied in the Supreme Court Rules 1970 Part 20 r 10 as follows:
"(1) Where there is a clerical mistake, or an error arising from an accidental slip or omission, in a minute of a judgment or order, or in a certificate, the Court, on the application of any party or of its own motion, may, at any time, correct the mistake or error."