The Structure Of A Series: Dornford Yates

(I am currently rereading Dornford Yates' novels after a gap of about fifty five years so some of what I write here might have to be revised.)

In Gale Warning:

Jonathan Mansel, Richard Chandos and George St. Omer have been fighting crime outside the law for a while;

the mastermind, Barabbas, organizes the murder of St. Omer;

however, St. Omer's friend, John Bagot, joins Mansel and Chandos and helps them to bring down Barabbas;

Chandos' wife is called "Jenny."

You might deduce from this account that Gale Warning had been preceded by several earlier volumes of a Mansel/Chandos/St. Omer series? Instead, it was preceded by six Chandos books that gradually paved the way for the situation as described in Gale Warning.

The Opening Diptych (= Two Volumes)
In Blind Corner, Mansel, Chandos and George Hanbury (not St. Omer) defeat "Rose" Nobel and appropriate buried treasure.
In Perishable Goods, Mansel, Chandos and Hanbury defeat a kidnapping and blackmail attempt by Noble and Mansel kills Noble.

A Second Diptych
In Blood Royal and Fire Below, Chandos and Hanbury, without Mansel, have adventures in a fictional European country and both wind up married.

Two Further Novels
In She Fell Among Thieves:

Mansel is back;
but Hanbury, Hanbury's wife and Chandos' first wife have died;
Chandos meets and will marry Jenny.

An Eye For A Tooth:

is a flashback sequel to Blind Corner, set before Perishable Goods;
therefore, shows Hanbury still alive;
retroactively transforms the opening diptych into a trilogy.

That leaves only two Chandos Books, Red In The Morning and Cost Price, set after Chandos has married Jenny and they are also set after Gale Warning. There are other complications to be addressed later.