Question: Who was a founding father of the folk-song revival in England in the early 20th century and had a portait painted of them by Esther Blaikie MacKinnon?

Lucy Etheldred Broadwood (9 August 1858 – 22 August 1929) was an English folksong collector and researcher during the late 19th and early 20th centuries.  As one of the founder members of the Folk-Song Society and Editor of the Folk Song Journal, she was one of the main influences of the English folk revival of that period.  She was an accomplished singer, composer, piano accompanist, and amateur poet.  She was much sought after as a song and choral singing adjudicator at music festivals throughout England, and was also one of the founders of the Leith Hill Music Festival in Surrey. <SEP> Cecil James Sharp (22 November 1859 – 23 June 1924) was the founding father of the folk-song revival in England in the early 20th century. <SEP> Esther Blaikie MacKinnon (1885–1934) was a Scottish artist, who was known for her paintings and engravings.  Notable were her portraits of Cecil and Evelyn Sharp, which currently are part of The National Portrait Gallery's primary collection.  During her career, MacKinnon worked with a variety of media including paint, dry point, etchings, and black and white drawings.  Her work was exhibited at the Royal Scottish Academy, the Royal Glasgow Institute, the Royal Academy, and the Society of Women Artists within her lifetime. <SEP> Ecology is a new science and considered as an important branch of biological science, having only become prominent during the second half of the 20th century.  Ecological thought is derivative of established currents in philosophy, particularly from ethics and politics.  Its history stems all the way back to the 4th century.  One of the first ecologists whose writings survive may have been Aristotle or perhaps his student, Theophrastus, both of whom had interest in many species of animals and plants.  Theophrastus described interrelationships between animals and their environment as early as the 4th century BC.  Ecology developed substantially in the 18th and 19th century.  It began with Carl Linnaeus and his work with the economy of nature.  Soon after came Alexander von Humboldt and his work with botanical geography.  Alfred Russel Wallace and Karl Möbius then contributed with the notion of biocoenosis.  Eugenius Warming’s work with ecological plant geography led to the founding of ecology as a discipline.  Charles Darwin’s work also contributed to the science of ecology, and Darwin is often attributed with progressing the discipline more than anyone else in its young history.  Ecological thought expanded even more in the early 20th century.  Major contributions included: Eduard Suess’ and Vladimir Vernadsky’s work with the biosphere, Arthur Tansley’s ecosystem, Charles Elton's "Animal Ecology", and Henry Cowles ecological succession.  Ecology influenced the social sciences and humanities.  Human ecology began in the early 20th century and it recognized humans as an ecological factor.  Later James Lovelock advanced views on earth as a macro-organism with the Gaia hypothesis.  Conservation stemmed from the science of ecology.  Important figures and movements include Shelford and the ESA, National Environmental Policy act, George Perkins Marsh, Theodore Roosevelt, Stephen A. Forbes, and post-Dust Bowl conservation.  Later in the 20th century world governments collaborated on man’s effects on the biosphere and Earth’s environment.