 የዩናይትድ ስቴትስ የባህር ጠረፍ ጥናት ዋና ሃይድሮግራፈር ሄንሪ ሚቼል በ 1868 ለሱዝ ካናል ዘገባ ሲሰራ ለዚህ እንቆቅልሽ ተጨማሪ ፍንጭ አግኝቷል።
Henry Mitchell, Chief Hydrographer of the United States Coast Survey discovered an additional clue to this riddle while working on a report for the Suez Canal in 1868.