It is claimed that the philosopher GE Moore had a fantasy. After many years’ work, Tolstoy had finally finished War and Peace. Sonya had copied it out for the umpteenth time. The thing goes off to the printer. Peace reigns. And then, in the middle of the night, Tolstoy leaps out of bed, shrieking, “I forgot to put in a yacht race!”

Great Mariinsky ballerinas are a breed apart, even from Bolshoi women. They take the stage with a consciousness of entitlement that’s thrilling to watch, and when this almost sacred sense of mystique and grace instilled in St Petersburg comes with vivid expressive distinction too, then there really is nothing like it. Even if three American 20th-century ballets might not be thought the likeliest territory to make such discoveries, what a night for ballerinas last night was. Viktoria Terëshkina and Alina Somova are on their way to joining the peerless Uliana Lopatkina at the high table.

It is all too easy to be cynical about the ballet version of Don Quixote. With almost no part for the title character, it is a 19th-century Russian take on faux-Spanish dancing, a farce in which the barber Basilio longs for the charming Kitri, while her father wants her to marry a rich fop. As the Radio Times used to say, “Much hilarity ensues.”

Mikhail Fokine, choreographer to both West and East, looked forward and back, too. He studied in the old Imperial Theatre School when the tsars ruled Russia, and he was also Diaghilev’s creative genius at the Ballets Russes, moving dance into the 20th century before and after the Revolution. The Mariinsky, once his home, is a premier exponent of his multifaceted styles. 

Act IV is the core of Swan Lake. It doesn’t seem so theatrically, being a peculiar 20-minute bolt-on after an interval that frequently lasts longer than the act that follows. But musically it transcends everything that has gone before, its thready little waltz one of the most delicately tragic things Tchaikovsky ever wrote. And balletically, Lev Ivanov’s rigidly structured classicism draws viewers into the terrifying void that is death. While emotionally the frozen swan-maiden of Act II and the brazen strumpet of Act III here merge to create the incarnation of suffering woman.

The Royal Opera House prides itself on knowing exactly who is registering on its mailing services, and just how high-class they are. Mr, Mrs, Ms, Miss, Dr, really can’t cover the possibilities. Hence the hilarity greeting their online registering process, which offers no fewer than 132 options for your title - which it is mandatory to fill in.

Tosca-at-Covent-Garden is a commodity, like bacon-for-breakfast - a pricier commodity, to be true, at officially up to £229.50 a seat, but in both cases people want to get what they expect. For the final performances next month in this summer revival, with the megastars Angela Gheorghiu, Jonas Kaufmann and Bryn Terfel, all seats are sold, with touts on eBay offering a pair of amphitheatre seats at bids over £300.

If an excess of enthusiasm troubles you, look away now. Because this is less a review, more a love letter. Alina Cojocaru has been astonishing audiences for more than a dozen years. Regular ballet-goers attend her performances expecting to be thrilled. I went expecting to be thrilled. What I didn’t expect was to have a ballet I have been watching for 30-odd years suddenly seem new.

Programming a mixed bill is a very delicate art, and what seems like an interesting mix to one person might appear to be an entirely random series of choices to another. The Royal’s new triple is the perfect example. The music – Stravinsky, Poulenc, Stravinsky – might suggest an air of 1920s Parisian je ne sais quoi in theory, but in practice, that’s not how things unfold, with an odd combination of Ashton at his spiky chic-est, followed by Glen Tetley’s quasi-religious memorial meditation, and topped by Macmillan at his – well, more of that anon.

Being a choreographer is harder than it looks. Steps, movement, are just the beginning. On top of that you need to have a sense of theatricality, and then, even more, you need to be able to convey your ideas, through movement alone, to the audience. On these counts, Bern:Ballett’s visit to the Linbury fails to make the grade.