In 842 or thereabouts, according to the "Deeds of the Bishops of Naples", Saracens from Sicily occupied the Pontine Islands and the isle of Licosa, but were driven off by Duke Sergius I of Naples and a coalition he had formed with Amalfi, Gaeta and Sorrento. Deprived of their island bases, these Saracens occupied the harbour of Miseno near Naples. From there they launched their attack on Rome the next year. This source can be reconciled with those which give the raiders an African origin, since the Muslims then conquering Sicily under the Aghlabids were originally from Africa.