A collection of 10 paintings by acclaimed Scottish artist James McIntosh Patrick will be auctioned in his home town of Dundee.
The three oils and seven watercolours are expected to fetch up to £30,000.
The artist's work is displayed in museums including the Tate and in galleries in South Africa and Australia.
The paintings go under the hammer at Dundee auctioneers Curr and Dewar on 18 April.
The private collection was put together by an Aberdeenshire man and were put up for auction following his death.
Auctioneer Steven Dewar said it was "pretty much unheard of" for such a large selection of original works by McIntosh Patrick, who died in 1998, to come up for sale at the same time.
He said: "I've sold maybe two or three oils of his in the last two to three years and maybe a watercolour once or twice a year.
"So to get this whole collection at once is pretty unique."
Mr Dewar said the oils are valued at between £6,000 to £10,000 each, with the watercolours valued at about £1,000.
He said: "When the seller called me I assumed he was bringing a lot of prints to me.
"I was amazed when he came in and had these 10 originals, it is a great collection and very unusual.
"The collection has been put together over a period of time - it really is a rarity to get them all coming up together."
McIntosh Patrick was born in Dundee in 1907 and studied at the Glasgow School of Art from 1924 to 1928.
His 90th birthday was marked by an exhibition at the Scottish National Gallery of Modern Art and he was made an OBE the same year.
Mr Dewar said: "McIntosh Patrick was well known for capturing local landscapes - he was prolific and would often be seen sitting at a road end painting.
"His work is very much sought after - he is very well recognised and regarded."