Chapter 62. SISTER pages 270 - 274
"'This is Sarah,' said Odile, when Hollis found her, on the crowded cafe patio of a municipal gallery."[...]
"[Chombo] implements finite differential methods for the solutions of partial differential equations, on block-structured, adaptively refined rectangular grids".
Chapter 62. SISTER
Hollis and Odile meet Sarah Ferguson, Bobby "Chombo" Ferguson’s sister, look like Bobby "but it looks better on a girl." Odile and Sarah share an ex in common who gives Odile information to contact Sarah. Sarah tells them that she knows Bobby [who Sarah describes as an irresponsible, self-centered, yet mathematically gifted "fuck up"] is in town; a mutual friend saw him earlier and called Sarah. Sarah tells Hollis that Bobby was a fan of The Curfew and volunteers the address where Bobby is most likely hiding. [514 characters]
The name "Sarah Ferguson", to a British readership, will conjure up images of "Fergie", the Duchess of York and tabloid celebrity.