1671 John Ogilby Brittania route 87 Welshpool to Caernarfon
1795 Evans J – Map of North Wales (ca 1795). Available online from National Library of Wales.
1802 Williams W Observations on the Snowdon mountains
1809 Edmund Hyde Hall, A Description of Caernarvonshire (1809-1811) ed Emyr Gwynne Jones 1952
1818 Ordnance survey drawing 2in/mile in British Library cat nos 301,305,306.
1838 Ordnance survey 1in/mile 1st ed
1845 James Bransby – A description of Llanberis & the Snowdon district
1851 https://www.genuki.org.uk/big/wal/CAE/Llanddeiniolen
1891 Ordnance Survey 6in/mile & 25in/mile 1st edition 1891
1899 Jenkins D E, Bedd Gelert; its facts, fairies and folklore
1920A William Ashton, The Evolution of a Coastline
1959 Pritchard R T, The Porthdinllaen turnpike trust Trans Caerns Hist Soc vol 20 (1959)
GAT refers to Gwynedd Archaeological Trust sites, as detailed in Archiwilio
GAS refers to Gwynedd Archives service at Caernarfon records office.
Hemp W. J. Y Cymrrodor vol33
M I. D. Margary, Roman Roads in Britain 1st edition
W Edmund Waddelove, The Roman Roads of North Wales, 1999. ISBN 0 9506803 1 1.
Wikipedia Roman roads contains references to Siculus Flaccus, and Ray Lawrence The Roads of Roman Italy: Mobility and Cultural Change which are not readily available elsewhere. See also William Smith (1890) A Dictionary of Greek and Roman Antiquities volume 2 pp 946-954.
Birgitta Hoffmann Archaeology v Tacitus Agricola 2001
Evidence in the UK of a via vicinalis see https://romaninscriptionsofbritain.org/inscriptions/2443.19
Lidar references taken from National Library of Scotland “side by side” mapping resources.
Revision date 26th April 2024
