Portland Castle (English Wikipedia)

Lawson 2002, p. 3; Harrington 2007, p. 22; Royal Commission on the Historical Monuments of England (1970), "Portland", British History Online Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3. Harrington, Peter (2007). The Castles of Henry VIII. Oxford, UK: Osprey Publishing. ISBN 978-1-4728-0380-1.
Lawson 2002, p. 3; Royal Commission on the Historical Monuments of England (1970), "Portland", British History Online Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.
Lawson 2002, pp. 7–8; Royal Commission on the Historical Monuments of England (1970), "Portland", British History Online Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.

doi.org

Harrington 2007, p. 11; Walton 2010, p. 70 Harrington, Peter (2007). The Castles of Henry VIII. Oxford, UK: Osprey Publishing. ISBN 978-1-4728-0380-1. Walton, Steven A. (2010). "State Building Through Building for the State: Foreign and Domestic Expertise in Tudor Fortification". Osiris. 25 (1): 66–84. doi:10.1086/657263. S2CID 144384757.

Lawson 2002, pp. 4, 32; http://www.english-heritage.org.uk/visit/places/portland-castle/garden/ Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.
"Portland Castle", English Heritage; "List entry", Historic England

"List entry", Historic England
Lawson 2002, p. 20; Harrington 2007, p. 8; "List entry", Historic England Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3. Harrington, Peter (2007). The Castles of Henry VIII. Oxford, UK: Osprey Publishing. ISBN 978-1-4728-0380-1.
"Portland Castle", English Heritage; "List entry", Historic England
Lawson 2002, p. 5; "List entry", Historic England Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.
Lawson 2002, p. 14; "List entry", Historic England Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.
Lawson 2002, pp. 5, 9; "List entry", Historic England Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.

"WELD (WILD), Humphrey (1612-85), of Lulworth Castle, Dorset and Weld House, St. Giles in the Fields, Mdx". History of Parliament Trust. Retrieved 27 July 2019.
"TRAVELL, Sir Thomas (c.1657-1724), of Jermyn Street, Westminster, Mdx. and Milborne Wick, Som". History of Parliament Trust. Retrieved 27 July 2019.
"STEWARD, Gabriel (1731-92), of Nottington, Weymouth, Dorset". History of Parliament Trust. Retrieved 28 July 2019.
"STEWARD, Gabriel Tucker (c.1768-1836), of Berkeley Square, Mdx". History of Parliament Trust. Retrieved 28 July 2019.
"PENN, John (1760-1834), of Stoke Park, Stoke Poges, Bucks. and Pennsylvania Castle, Isle of Portland, Dorset". History of Parliament Trust. Retrieved 27 July 2019.

Biddle et al. 2001, p. 12; Lawrence H. Officer; Samuel H. Williamson (2014), "Five Ways to Compute the Relative Value of a UK Pound Amount, 1270 to Present", MeasuringWorth, retrieved 26 September 2015 Biddle, Martin; Hiller, Jonathon; Scott, Ian; Streeten, Anthony (2001). Henry VIII's Coastal Artillery Fort at Camber Castle, Rye, East Sussex: An Archaeological Structural and Historical Investigation. Oxford, UK: Oxbow Books. ISBN 0-904220-23-0.

Lawson 2002, pp. 30–32; "Monument No. 1413734", Historic England, retrieved 31 August 2015 Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.
"Monument No. 1420378", Historic England, retrieved 31 August 2015
Lawson 2002, p. 8; "The Governor's Garden", Historic England, retrieved 31 August 2015 Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3.

Harrington 2007, p. 11; Walton 2010, p. 70 Harrington, Peter (2007). The Castles of Henry VIII. Oxford, UK: Osprey Publishing. ISBN 978-1-4728-0380-1. Walton, Steven A. (2010). "State Building Through Building for the State: Foreign and Domestic Expertise in Tudor Fortification". Osiris. 25 (1): 66–84. doi:10.1086/657263. S2CID 144384757.

BDRC Continental (2011), "Visitor Attractions, Trends in England, 2010" (PDF), Visit England, p. 65, archived from the original (PDF) on 19 September 2015, retrieved 19 September 2015

BDRC Continental (2011), "Visitor Attractions, Trends in England, 2010" (PDF), Visit England, p. 65, archived from the original (PDF) on 19 September 2015, retrieved 19 September 2015

Fry 2014, pp. 13–14 Fry, Sebastion (2014). "A History of the National Collection: Volume Two, 1900–1913". Research Report Series. London, UK: English Heritage. ISSN 2046-9799.
Lawson 2002, pp. 3, 32; Chapple 2014, p. 84 Lawson, Susannah (2002). Portland Castle: Dorset. London, UK: English Heritage. ISBN 978-1-85074-725-3. Chapple, Nick (2014). "A History of the National Collection: Volume Six, 1945–1953". Research Report Series. London, UK: English Heritage. ISSN 2046-9799.