Alan (robert Colquhoun) Grieve ( 1910 - 1970 ) was an Australian painter. Alan (robert Colquhoun) Grieve s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1694.25 USD for Yachts Moored on Sydney Harbour in 2006 to 3073.77 USD for YUNNAN LANDSCAPE in 2007 , based on the size and medium of the artwork.