You've finished this scene

Holmes and Watson finish their inspection and stand with Helen on the lawn. After thinking in silence with a grave expression, Holmes begins giving her instructions for the coming night. Before explaining the details, he insists that she must follow every direction exactly, and his manner is intensely serious. The scene begins from this carefully established point.
"It is very essential, Miss Stoner," said he, "that you should absolutely follow my advice in every respect."
「ストーナーさん、何よりも大事なのは」と彼は言った。「私の助言を、あらゆる点で必ず守ることです」
"I shall most certainly do so."
「必ずそういたします」
"The matter is too serious for any hesitation. Your life may depend upon your compliance."
「事は重大で、ためらっている余裕はありません。あなたの命は、従っていただけるかどうかにかかっているかもしれないのです」
"I assure you that I am in your hands."
「お約束します、私はあなたにすべてお任せします」
"In the first place, both my friend and I must spend the night in your room."
「まず第一に、私も友人も、今夜はあなたの部屋で過ごさねばなりません」
Both Miss Stoner and I gazed at him in astonishment.
ストーナーさんも私も、驚いて彼の顔を見つめた。
"Yes, it must be so. Let me explain. I believe that that is the village inn over there?"
「そうです、そうしなければならないのです。説明しましょう。向こうに見えるのは、村の宿屋ですね?」