As stated in the Foreword to Two Pigs and a Chicken (partially repeated below), the setting of the Erindale Tales was meant to be an imaginary land which had no relation to any particular place or time in our own world, save that — as in the case of much ‘historical’ fiction — it basks in the rosy glow that nostalgia casts on ‘simpler’ times, long past:

 There is a land which exists not in ordinary space and time, but only in our collective imaginations. A land where, far removed from the turmoil and strife of great cities and kingdoms, good men can live simple, honest lives, and pass on their values, little changed by the passage of time, to their sons and grandsons, and from them to their sons and grandsons.

 However, as other novels were added to the series it became useful to think of the Tales as being set in a ‘real’ place and time, so I added an Afterword to the second novel, suggesting that Erindale could be thought of as a remote area on the west coast of what is now the United Kingdom, in the early to mid-1800’s. But although a few real-world places and practices are referred to as the series progresses, Erindale will remain an imaginary place, beyond the reach of real-world events or concerns.
 With that in mind, here is a timeline for Tales already or nearly in print (ignoring any Prologues):