The county of Midlothian was known, officially, as the County of Edinburgh until 1921, and was sometimes called '''Edinburghshire''' during the 19th century. Traces of this can be found in the name of the Heart Of Midlothian mosaic on the Royal Mile , and Heart Of Midlothian F.C. , both of which are based firmly within the city boundaries, and are no longer part of Midlothian at all.