"Take this to the concierge of the house opposite. It's the man in the cap smoking his pipe in the gateway."
The concierge hurried across and, after Ganimard had announced himself as a chief-inspector, Shears asked if a young lady in black had called at the house on Sunday morning.
"In black? Yes, about nine o'clock: it's the one who goes up to the second floor."
"Do you see much of her?"
"No, but she's been oftener lately: almost every day during the past fortnight."
"And since Sunday?"
"Only once ... without counting to-day."
"What! Has she been to-day?"
"She's there now."
"She's there now?"