この場面を読み終えました

月曜に氏が都心へ出た後、夫人にも荷物到着の電報が届く。夫人は買い物と荷物の受け取りを済ませ、駅へ戻る途中でスワンダム横丁を歩く。
"Last Monday Mr. Neville St. Clair went into town rather earlier than usual, remarking before he started that he had two important commissions to perform, and that he would bring his little boy home a box of bricks. Now, by the merest chance, his wife received a telegram upon this same Monday, very shortly after his departure, to the effect that a small parcel of considerable value which she had been expecting was waiting for her at the offices of the Aberdeen Shipping Company. Now, if you are well up in your London, you will know that the office of the company is in Fresno Street, which branches out of Upper Swandam Lane, where you found me to-night. Mrs. St. Clair had her lunch, started for the City, did some shopping, proceeded to the company's office, got her packet, and found herself at exactly 4:35 walking through Swandam Lane on her way back to the station. Have you followed me so far?"
「先週の月曜、ネヴィル・セントクレア氏はいつもより少し早く都心へ出た。出る前には、大事な用事が二つあり、息子に積み木を一箱買って帰るつもりだと話していた。ところがまったくの偶然で、同じ月曜日、夫が出た少し後に、夫人の待っていた高価な小包がアバディーン海運会社の事務所に着いているという電報が届いた。ロンドンの地理に詳しければ分かるだろうが、その事務所はフレズノ街にあり、きみが今夜私を見つけたアッパー・スワンダム横丁から枝分かれしている。夫人は昼食を取り、シティへ向かい、買い物をしてから会社の事務所へ行って小包を受け取った。駅へ帰る途中、ちょうど四時三十五分にスワンダム横丁を歩いていたんだ。ここまでは分かったかい」
"It is very clear."
「実によく分かるよ」