five o’clock
`` Natacha ! Natacha ! '' -LRB- Here more Russian . -RRB- As Natacha started to leave , Michael placed his hand on her shoulder , stopped her and said , looking her direct in the eyes : `` There will be a letter from Annouchka this evening , by a messenger at five o'clock . '' He made each syllable explicit . `` Very important and requiring an immediate reply . '' These notes of Rouletabille 's are not followed by any commentary .