An unexpected historical discovery has been made at Scottish Water's site at Glencorse, near Penicuik -- a Roman marching camp nearly 2000 years old. The revelation has provided another clue as to how the Romans organised their occupation of the Lothians. It had not been confirmed whether the site was, in fact, a Roman marching camp, which had previously only been suggested by aerial photographs... It is believed the site, which is part of a network of other bases, watchtowers and camps across lowland Scotland, was situated to guard a gap in the Pentland Hills to the northwest of Flotterstone...