Gareth Heilwyn was an engineer at Boston Lodge. Heilwyn completed work on Bertram in 1879, however his team were unable to give him a tender. He informed Bertram of Duke going to work on an island.
Heilwyn was quite friendly towards Bertram and showed kindness as he tried to assure Bertram that everything was fine.
- Gareth Heilwyn is the first human character to feature in the series.