When Bossi realized that he was being spied on, he left the country immediately. Whether it was this or the revolutionary movement that forced him to go will never be known. Certainly, it does seem a little unlikely that he was the only man who understood the inlayering process since the style and method of making these mantelpieces is so similar to 17th century Florentine inlaid marble work. Such work was usually made by chiseling out the white marble ground in defined patterns and filling up the grooves with coloured marble compositions or earth pastes of various colours. The designs were Adam style patterns, usually of naturalistic leaves and flowers.