1. A single-storied L-shaped of brick and stone construction, now in a decaying state.

Event and Historical Information:
This station was part of the Liverpool and Holyhead Telegraph network (see NPRN 300822) and was originally built in 1827. The station was rebuilt in 1841 and converted in 1887 to a biological station.

Sources include
Historic Admiralty Chart 1170-A4, RCAHMW Digital Collections sourced from UK Hydrographic Office (published 1839)
Large, F, 1998, Faster than the Wind: The Liverpool to Holyhead Telegraph, publsihed by Avid Publications.

RCAHMW, October 2011.

2. Visited by Royal Commission survey staff during the EU-funded CHERISH Project on 21 June 2018. The 1841 remains comprise a square, roofless brick building with four rooms arranged around a central chimney, and fireplaces serving each room. The building is entered by doors on the east and north sides, with steps descending into the ruin on the north side. Extending from the north-west corner of the building is a long observation/signalling room culminating in a panoramic curving window now represented by the rusting remains of vertical frames. Set externally on the south wall is a smart dressed stone engraved plaque pronouncing; 'PUFFIN ISLAND TELEGRAPH, Built in 1841 by the TRUSTEES of the LIVERPOOL DOCKS'. A low stone structure of rougher build is sited some 10m to the north-east of the telegraph building. It may represent a toilet and store, or an earlier building.

T. Driver, 2019. ? Crown: CHERISH PROJECT 2018. Produced with EU funds through the Ireland Wales Co-operation Programme 2014-2020. All material made freely available through the Open Government Licence.