Ernest is a faithful friend of Cogg and often nips round to the clock shop for a cup of tea. He has been helping in the area for years and loses his key, Professor Layton and the team were on hand to help him out, making a key out of blocks, he is never seen again in the game after this incident.
Ernest gives the following puzzles in Professor Layton and the Unwound Future:
"Ernest is a timid old man who dislikes talking to strangers, and he spends most of his time hiding on a corner in Midland Road. He is friends with Cogg and often goes 'round to the clock shop for a cup of tea."