[1] In 1951, he arrived in East Anglia, which would become the site of his "signal achievements", to excavate the Roman town at Caister-on-Sea, close to Great Yarmouth and across from Burgh Castle.

[1] He was credited with "a far-seeing interdisciplinary approach" for "A Human Skull from Runham, Norfolk" (1961) and "Broadland Fords and Causeways" (1961), "historical topography" in "The Lost Vill of Ness" (1969), and "emergent industrial archaeological considerations" for the "entrancing" "Herring-Nets and Beatsters" (1969).

The book benefited from Green's considerable experience in boat-handling along Western Ireland and the entirety of the North Sea, giving him a realistic perspective on the capabilities of Anglo-Saxon ships, and was said to reflect "adventurous, though scientific, sea-faring".

[13] The first half of the work retold the story, published elsewhere and in more detail, of the burial; as the archaeologist Brian Hope-Taylor noted, "it is as though the British Museum's Provisional Guide, which most of us have known since it was so-thick, has suddenly filled out on reaching its middle teens".

"[13] Green's original contribution came in the second half of the book, where he discussed ship-construction from the fall of the Roman Empire to the Viking Age, and the problems of navigating the North Sea in keelless boats such as the Sutton Hoo ship.

[16] Travel from East Anglia to Schleswig, near modern-day Denmark, would have required hugging the coastline, he suggested,[13] resulting in a trip that could have taken up to two months.

[1] Shortly before his 1972 death, he had been undertaking a work on early sea-travel, especially the raids along the coasts of Roman Britain made by the Picts in their curraghs.