10 It is unnecessary to go into any further detail in relation to the delay since 14 April 2000, save to say that it was not deliberate but was caused by the neglect of the appellants' solicitors in Perth and in Bunbury. It is true to say that, during the relevant period, Mr Norton, the person who had the carriage of the proceedings on behalf of the appellants, did not communicate with the appellants' solicitors for six months. Mr Norton says that he was unaware of any delay in relation to the progress of the appeal. In particular, he says that he was not aware of any delay "in relation to the non-attendance of my solicitors or their agents before the Registrar to settle the appeal book index". He says that he had instructed the appellants' solicitors "to prosecute the appeal with due diligence and at no stage have those instructions changed". I accept that it was remiss on the part of Mr Norton to have refrained from being in communication with his solicitors for a lengthy period, but that was not a material factor in the delay. In my opinion, to all intents and purposes, the responsibility for the delay as from 14 June 2000 when the draft appeal book index was filed must be attributed to the appellants' solicitors. As in Esther Investments Pty Ltd v Markalinga Pty Ltd (1989) 2 WAR 196 at 206: