In 1980, watercolours, drawings and sketches, together with notes, letters and diaries were sold as part of the artist's studio sale. Some were sold in Ireland and others at a studio sale at Christie's in London. The National Gallery of Ireland purchased seven fine watercolours for its permanent collection. Fota House in Cork contains one of her works. An Exhibition of Butler's work was held by the Kilkenny Art Gallery Society at Kilkenny Castle in June 1981 which included pieces such as "Where the Grass Grows Green (1904)" It was further exhibited at the Bank of Ireland, Baggot Street, Dublin in August 1981 and at Christies, King Street, London in September 1981. In 1987 Kilkenny Art Gallery, Kilkenny, presented an exhibition " Mildred Anne Butler", which included "Cats Chasing Birds (1918)". Between August–September 1987 the Crawford Municipal Art Gallery, Cork, presented an exhibition "Mildred Anne Butler 1858-1941. An Irish Edwardian Watercolour Collection" which included "Figures beside a horse and chaise (1896)" In April to June 1988 Ulster Museum and Art Gallery, Belfast, presented an exhibition " Mildred Anne Butler" which included "Cats Chasing Birds (1918)". She is celebrated on a Postage stamp in an An Post collection for female Irish artists.