“you really did it very well”这句话出自艾琳・艾德勒写给福尔摩斯的信中。在《福尔摩斯探案集》的《波西米亚丑闻》中,福尔摩斯受波西米亚国王之托,试图从艾琳・艾德勒手中取回一张对国王不利的照片。福尔摩斯设下计谋,成功让艾琳・艾德勒暴露了照片的位置,但艾琳・艾德勒在事后也意识到自己被福尔摩斯欺骗。于是,她在离开之前给福尔摩斯写了一封信,信中开头便写道 “MY DEAR MR. SHERLOCK HOLMES,—You really did it very well. You took me in completely. Until after the alarm of fire, I had not a suspicion”。