[14] It is believed that this was sited along the eastern boundary of the modern parish where the low-lying marshland which forms the border with South Cove was previously navigable.[16][20] It was first suggested as a Danish fortification by Claude Morley in 1924, after finding a site on the nearby river bank that he suspected to be the Domesday port.[24] During the excavation, he found glazed tiles (which he dated to the thirteenth century[24]), a Gallic pot,[25] the foundations of a wall, the remains of timber, evidence of burning and a mound of burnt flint at the jetty.[26][27][d] Basil Brown visited the site with Guy Maynard (then curator of Ipswich Museum) during the excavation (on 31 January), and suggested it might have been constructed to prevent landing from the river.The surveyor stated that "its position rules out the possibility of it being a round barrow, motte, or windmill mound" and that the suggested dock "is a line of natural slopes".[16][20] Gatehouse Gazetteer opined that statements dismissing the possibility of it being a fortification were probably overstated and "based on false ideas about the function of castles.[35] Above the southern door to the church sits a distinctive and bright sundial, thought to be from the 18th century, reading "vigilate et orate" meaning "Watch and Pray" in Latin.