A Portraitist of the Early Nineteenth Century William Thomas was a painter active during the early nineteenth century. His professional period of activity spanned from 1806 to 1838. Hailing from the United Kingdom of Great Britain and Ireland, he contributed to the artistic record of his era through his portraiture. His documented work includes a notable portrait from 1819 titled William Munnew (or Munnoo); William Hickey. This specific piece is held within the collection of the National Portrait Gallery, London.