In his buttonhole he wore a yellow dahlia.
It was rather a singular flower for a boutonniere.
The Bradys noticed it at once.
"Look!" whispered Harry. "A yellow dahlia, the flower Mr. Butler was to wear so that we could identify him."
"Yes, but a young man—a mere boy. It must be a coincidence," the old detective replied.
"I don't know, governor. He has evidently spotted you. He is coming this way."
"Can Mr. Butler have sent a substitute?"
The boy approached the table.
He was dark and handsome, slightly undersized, and very well dressed.
"Excuse me," he said in a manly way, addressing the elder detective, "are you Old King Brady?"