Should a politician act upon practical necessity or be guided by theory? Cicero (1st century BCE) has several philosophers debate this question in ?On Public Affairs? (?De re publica?), ending with the ?Dream of Scipio?, a vision of heavenly glories awaiting selfless politicians. Macrobius (5th century CE) commented on the 'Dream? through the lens of contemporary philosophy which argued a superior transcendent reality. The commentary?s mysticism and its views of geography (proposing a round earth) appealed to medieval theologians. This manuscript?s handwriting style and inclusion of verses by Rhygyfarch (Ricemarch), poet of St David?s, link it with Wales. The diagram on this page shows Macrobius?s view of the disc of the earth encircled and bisected by an ocean. It also shows the five climatic belts, the central ?torrid? zone split by the ocean between the eastern and western points.