Roberts's drawing celebrates the architecture and decoration of Rosslyn Chapel. The drawing refers to two legends that relate to the Chapel's early history and construction. The two dogs that Robert included allude to the St Clair family, who founded the Chapel in 1466. A motif of two dogs is associated with the family because of an old hunting tale. In the left part of the drawing is a column carved with rich foliate designs that ascend in a spiral. This is the 'Prentice Pillar', which according to legend was the work of an apprentice stonemason whose master killed him in a fit of envy on seeing the completed column.