Based on a seriation of the scarab seals of the Second Intermediate Period available in 1900 AD, George Willoughby Fraser was able to date Sheshi's reign to "a short dynasty before the Hyksos invasion". More recently, Ryholt obtained a similar result using his own seriation and places Sheshi before Yaqub-Har and the great Hyksos rulers Khyan and Apophis and after Yakbim Sekhaenre, Ya'ammu Nubwoserre, Qareh Khawoserre and 'Ammu Ahotepre. Rolf Krauss independently reached the same conclusion. Given that the earliest 14th Dynasty ruler mentioned on the Turin canon is Nehesy, a king who left several attestations of his reign in the Delta region, and that there is only space for one predecessor for Nehesy on the canon, Ryholt concludes that the earlier document from which the canon was copied had a lacuna preceding Nehesy. Such lacunae are noted as wsf on the canon and could cover any number of kings. Thus, Ryholt sees no obstacle with having Sheshi succeed 'Ammu Ahotepre and immediately precede Nehesy.
