The Romans hauled their oysters south to Rome:
And was angry that my trust could not repose
'Romans hauled' - suggests hard work to obtain luxury, criticism of Empire + 'raping' environment (Britain to Ireland)
'south to Rome' - British sending Irish produce south to London
'Glut of privilege' - connotes status, London benefit from Irish
'And was angry' - enjambment from previous stanza, anger of Irish who have failed to save their country
'my trust' - Ireland's trust
'could not repose' - Ireland being caught off guard