Harry had not noticed the arrival of the unfamiliar young woman, had she arrived before him. It was possible she had been one of the less tardy guests, as he himself had arrived more than an hour into the evening's celebrations, Nell in tow, having come from giving strict orders for the Theatre's security with Will.
And now Nell had disappeared, probably having stolen a bottle of some sort and was supping it quietly under a table somewhere. Harry had half a mind to start looking under the long cloths, but the other half of his mind was far more sensible and merely guided him back to top-up his own glass. A few more and he would no doubt be searching under the tables to drag Nell out, but one more glass would mean he no longer cared, and could enjoy avoiding those he wished not to speak to, including the Russian.