30 Between the date of the liquidator's appointment and the receivers' sale of the Newtronics' business, the liquidator, Mr Stewart, had a duty to investigate the historical records and affairs of Newtronics although it seems that there was some delay to the commencement of those investigations pending the execution of his indemnity with Seeley. Seeley's solicitors had been Thomson Playford and at some point acted also for the liquidator. The receivers enquired of Thomson Playford about whether there was any information known to them affecting the validity or enforceability of the mortgage debenture and consequently of the receivers' appointment. Thomson Playford responded on 6 March 2002 that it would be inappropriate to respond to the enquiry in the circumstances in which the liquidator was currently attempting to obtain all books and records of Newtronics and was undertaking investigations into the circumstances of the creation, registration, existence and amount of the charge held by Atco over the assets of Newtronics. Mr Stewart gave evidence in his witness statement, and orally, that he had instructed Thomson Playford to act for him by 6 March 2002 but subsequently said, through counsel, that he made a mistake in giving that evidence. However, his other evidence was that he did see this correspondence between the receivers and Thomson Playford, and the incontrovertible fact is that he took no steps to challenge the appointment of the receivers until well after their sale of the Newtronics business. That is not to say that he or Newtronics is estopped from contending that the appointment was invalid but, rather, that his conduct provides additional objective evidence (if it be necessary) of the reasonableness of the belief held by the receivers concerning their appointment. From the receivers point of view, by March 2002, they had been acting as receivers to the knowledge of the liquidator whose legal duty included that of investigating the historical records and affairs of the very company whose business was about to be sold. Indeed, the sale of the business was both active and imminent. In that context it was reasonable for them to take some measure of comfort from the absence, when asked, of any foundation for the liquidator to doubt the validity of their appointment. To that may be added that Mr Stewart and his staff had had largely full, free and unsupervised access to the Newtronics records held by the receivers and were allowed to take folders for copying and were otherwise provided with substantial documentation. Mr Stewart had been kept informed about the sale process for the Newtronics' business and was provided with the sale documents before execution. From about 4 or 5 April 2002, he had in his possession at least the 2000 Newtronics' financial statements as well as the 1999 statements and the draft 2001 statements. The folder in which the 2000 statements were contained (marked "Pitcher Partners") had been specifically obtained from the receivers for copying by the liquidator's staff. The liquidator, who had a duty to investigate the historical affairs of the company, appears also to have held the belief that the receivers were validly appointed: he may not be estopped from contending that they were not, but they, in turn, may look to his conduct and belief to support the reasonableness of their own belief at the time.