Holmes and Poirot began their investigation by interviewing the family members. James, the son, seemed evasive and nervous, while Sophia, the daughter, was defensive and secretive.
"Ah, James, my dear fellow," Holmes said, his eyes piercing, "I notice you have a faint scratch on your hand. Care to explain?"
James hesitated before muttering something about a broken glass.
Poirot, meanwhile, was observing Sophia's body language. "Mademoiselle Sophia, you seem to be hiding something. What is it that you fear we will discover?"
Sophia's eyes darted around the room before she whispered, "I didn't take the necklace, but I know who might have."
As they continued their questioning, Holmes and Poirot uncovered a web of secrets and lies within the family. It became clear that each member had a motive for the theft.
"Ah, the plot thickens," Holmes exclaimed. "It seems we have a family of suspects, each with their own secrets and scandals."
Poirot nodded. "Indeed, mon ami. And it is up to us to unravel this tangled web and uncover the truth."
As they left the mansion, Holmes turned to Poirot with a grin. "The game is indeed afoot, Poirot. Let us see who will be the first to uncover the truth."
Poirot smiled back. "Ah, Holmes, I think this case will be a delightful challenge for both of us. Let us see who will be the first to solve it."
And with that, the friendly competition between the two detectives intensified, each determined to crack the case and prove their superiority.