Unexplored Territory
"Unexplored Territory" is an extra for On The Bias
"Unexplored Territory" begins just before Lizzie Penhallow and Geoffrey Carillon become engaged in May 1925 (the epilogue of Goblin Fruit) and ends just after the epilogue of On The Bias in October 1925. It's 12,000 words.
It does contain some spoilers for the events of On The Bias.
Get your copy of Unexplored Territory.
Check out the Books and extras timeline for how the different sections of these tales fit into the larger world of Albion. Extras are also linked from their related book page.
The Extras page has a complete list of extras with a brief summary, along with some other helpful information.