“It must be profitable,” Sissons continued, urgency rising in his voice, his face pink.

“Well, I imagine with a couple of factories, you are in a position to know.” The Prince smiled pleasantly, as if to conclude the matter.

“No!” Sissons said sharply, taking a step forward as the Prince took one away. “Actually three factories. But what I meant was not that it was profitable but that there is a great obligation upon me to make it so, otherwise over a thousand men will be thrown out of work, and the chaos and injury that would result from that would be appalling.” His words were tumbling out at increasing speed. “I could not even venture a guess as to where that would end. Not in that part of the city. You see, there is nowhere else for them to go.”

“Go?” The Prince frowned. “Why should they wish to go?”

Vespasia felt herself cringing. She had a very vivid idea of the soul-destroying poverty of parts of London, most especially the East End, of which Spitalfields and Whitechapel were the heart.

“I mean for work.” Sissons was becoming agitated. It was plain in the beads of sweat on his brow and lip, which were glistening in the lights. “Without work they will starve. God knows, they are close enough to it now.”

The Prince said nothing. He was clearly embarrassed. It was a most unseemly subject in this gorgeous, lavish display of pleasure. It was poor taste to remind men with glasses of champagne in their hands, and women decked with diamonds, that within a few miles of them thousands had not food and shelter for the night. It made them uncomfortable.

“It is necessary I stay in business!” Sissons’s voice rose a trifle, carrying above the hum of other conversations and the beat of the distant music. “I have to make sure I collect all my debts… so I can keep on paying them.”

The Prince looked bewildered. “Of course. Yes… it must be. Very conscientious, I am sure.”