Nicolas (Nicolai) Markovitch 1894-1964 also signs his work as "Marc" and watercolours of French and Swiss landscapes have featured in Auctions in Paris & Bern achieving three figure results () . I have two watercolours for auction of British landscapes . This one is Henley on Thames . I bought it from the art house Abbott & Holder , Museum Street WC1 1LH some 15 years ago for £135 plus framing . I think it is fair to say that many of his works involve water , reflecting the landscape thereabouts . They do appear to be steadily increasing in value and in my opinion he is a master of his medium .