G. J. Gibbs
A heliochronometer and brass dial by J.H.Steward, 66 Strand, London. Inscribed with points of reference from Conway Mountains NWbN to Ty Gwyn SbW. Revolving sight marked 'GJ Gibbs invenit'. On baluster stone plinth.
Marks and inscriptions
GJ Gibbs invenit (revolving sight marked)
Makers and roles
G. J. Gibbs J. H. Steward , maker