Half the Regencies you will ever read turn on the Season, and yet it is rarely explained, rather as though everyone were expected to have a great-aunt who could fill them in. Allow me to be that great-aunt.

What the Season was

The London Season was the social calendar of fashionable society, running roughly from the spring into early summer — broadly the months when Parliament sat, which is what drew the great families up to town in the first place. The countryside emptied of its gentry; the town houses of Mayfair were opened and aired; and for a few crowded months the beau monde — the “fashionable world” — threw itself into a whirl of balls, routs, dinners, the opera, the theatre, and morning calls that were, confusingly, paid in the afternoon.

Beneath all the pleasure ran a serious purpose, which is why it matters so to our stories. The Season was, in the plainest terms, a marriage market. It was where eligible young people were introduced, inspected, and, if all went to plan, paired off.

Coming out

A young lady “came out” when she was judged old enough to enter society, generally at seventeen or eighteen. Until that moment she was confined to the schoolroom; afterward she was, quite suddenly, on display. A first Season was a girl’s great audition, and a good deal of money and maternal scheming went into it. To reach the end of several Seasons unwed was to be edged, gently and cruelly, toward the dreadful word spinster — which is precisely why so many heroines arrive at the story with a chip of desperation, or defiance, beneath the muslin.

Almack’s, and the famous vouchers

No institution looms larger in the genre than Almack’s Assembly Rooms. The refreshments were notoriously dreadful — weak tea, stale cake, lemonade — and the company was the most exclusive in London, which tells you everything about what was really on offer. One could not simply buy a ticket. Admission required a voucher, granted at the whim of a small committee of grand ladies known as the Patronesses, whose approval could make a girl’s Season and whose disapproval could end it. To be refused a voucher was a social catastrophe; to be granted one was to be declared acceptable. You can see why a novelist finds them irresistible.

The rules of the floor

The ballroom had its own exacting grammar. A lady carried a dance card and pencilled in her partners; to engage herself to two gentlemen for the same set was a small disgrace. To dance more than twice with the same man in an evening was to announce something to the entire room, whether one meant to or not. A gentleman might ask only after a proper introduction, and a particular partner mattered enormously — which is why the waltz, when it arrived, caused such a delicious scandal. It was danced in a close embrace, and a young lady required a Patroness’s nod before she might attempt it. Half the longing in Regency fiction is conducted at the precise distance the rules allowed, and not an inch nearer.

The cut, the chaperone, and the whole armoury

Two more terms will serve you well. A chaperone — a married lady or respectable relation — accompanied an unwed girl everywhere, for an unguarded moment could undo her. And the cut direct was the cruellest weapon in the social arsenal: to look straight at an acquaintance and deliberately fail to recognise them, a public refusal that could wound far more sharply than any spoken insult. In a world where reputation was currency, these small gestures carried the force of artillery.