ms. presbury.mployer's engagement to ms. alice morphy, the daughter of the famous comparative anatomist. she resides next door to the presburys, does she not? >> how do you know of the engagement? >> the times, july the 1st, september the 5th, respectively. >> mr. holmes' memory is of a photographical order. >> quite so. oh, dear. >> mr. bennett, i do appreciate your predicament. as a scientist and a rationalist yourself, i dare say you are reluctant to accept the evidence insisted upon by ms. presbury. further, as her father's trusted assistant, to have recourse to me must smack to you of disloyalty. >> exactly. i'm part of the family, except that edith, ms. presbury, she was so upset that she... >> mr. bennett, who would you prefer to alienate? your prospective wife or her celebrated father? >> you give me a choice of evils. neither. >> then furnish me with the facts, and i will see how i can help you. you may rely on the discretion of both of us. >> well. >> would you, for example, describe ms.

ms. presbury. >> i decided i had to accompany jack, mr. holmes. >> have you brought the list of missing dates? >> yes. roy also barked on these nights. >> please, never mind that, mr. holmes. we have far more urgent matters to impart. >> is that so? ms. morphy has renounced my father. >> she's returned his ring? >> today, since when he has remained locked in his study. >> every time i've knocked, he's shouted abuse at me. >> the logic of it, watson. of this progression, do you see it? >> please. >> the first three occasions are self-evident. we know of those. what happened on the 5th of october? >> roy barked all night. on the 12th too. also days upon which the professor received packages from london east central. >> this is the date on which the face appeared at the window four nights ago. >> yes. >> and this is where the shadow appeared last night. of course! the common factor is two. always the gap decreases by two days. numbskull, holmes. >> and today is the 21st of october. >> did... >> yes, a