According to one legend, it all started when Robert, the young Duke of Normandy, saw Herleva from the roof of his castle tower. The walkway on the roof still looks down on the dyeing trenches cut into stone in the courtyard below, which can be seen to this day from the tower ramparts above. The traditional way of dyeing leather or garments was to trample barefoot on the garments which were awash in the liquid dye in these trenches. Herleva, legend goes, seeing the Duke on his ramparts above, raised her skirts perhaps a bit more than necessary in order to attract the Duke's eye. The latter was immediately smitten and ordered her brought in (as was customary for any woman that caught the Duke's eye) through the back door. Herleva refused, saying she would only enter the Duke's castle on horseback through the front gate, and not as an ordinary commoner. The Duke, filled with lust, could only agree. In a few days, Herleva, dressed in the finest her father could provide, and sitting on a white horse, rode proudly through the front gate, her head held high. This gave Herleva a semi-official status as the Duke's concubine. She later gave birth to his son, William, in 1027 or 1028.