Everything cascades in the final letters (139–150 thanks to a sudden analepse of more than three years with respect to the preceding letters. From letter 69 (71) to letter 139 (147) – chronologically from 1714 to 1720 – not a single letter from Usbek relates to the seraglio, which is unmentioned in any guise from letter 94 to 143 (and even in the edition of 1758 from supplementary letter 8 (97) to 145. Moreover, all the letters from 126 (132) to 137 (148) are from Rica, which means that for about fifteen months (from 4 August 1719 to 22 October 1720) Usbek is completely silent. Although he has in the meantime received letters, the reader does not learn of them until the final series, which is more developed after the addition of supplementary letters 9–11 (157, 158, 160) of 1758. Although Usbek has learned as early as October 1714 that "the seraglio is in disorder" (letter 63 [65). As the spirit of rebellion advances, he decides to act, but too late; with delays in the transmission of letters and the loss of some, the situation is beyond remedy.