LAND LAW – contract for the sale of land – notice to complete – obligations of vendor and purchaser under contract for the sale of land – where purchaser issued notice to complete making time of the essence – where purchaser itself then failed to complete within the time specified in the notice to complete – where vendor terminates the contract – whether vendor validly terminated contract for sale by reason of purchaser’s failure to complete – whether vendor in breach of contract by failing to provide keys to facilitate inspection of property – whether conduct of vendor a default that materially contributed to the failure of the purchaser to complete – whether vendor was itself ready, willing and able to perform its obligations to complete within the time specified in the notice to complete – held that vendor was entitled to terminate the contract – held that vendor is entitled to deposit.