 Horses racing at Leith were not regarded as being especially noteworthy though, so records are scarce.In 1752, the Plate was opened up to all horse 4 years old and over, and in 1756, 1757, 1758 and 1760, the Royal Plate was divided into two plates, 50 guineas each.The races were not held between 1741 and 1748, and their real popularity began in the latter half of the century.