W.S. Auchincloss, a civil engineer known for works on link and valve motions, brings a quantitative mindset to biblical prophecy in The Book of Daniel Unlocked. The book's central claim—that Daniel's 1290 days terminated in A.D. 33—rests on the sidereal year as a chronological basis, a choice endorsed by Assyriologist A.H. Sayce in his introduction. Sayce notes that this approach makes the prophecies 'end with the beginning of the history of the Christian Church,' a departure from interpreters who projected them into an unknown future.

Auchincloss's method is as notable as his conclusions. He instructs readers to 'obliterate' chapter and verse divisions from a certain point onward, treating the text as a continuous narrative. The book also draws on extra-biblical sources, including Josephus's casualty figures for the siege of Jerusalem, and correlates Daniel's visions with events such as the persecution described in Acts 8.

A Civil Engineer Reads Daniel

Auchincloss's professional background shapes his approach. The title page lists his earlier publications on steam-engine mechanics and rainfall laws, suggesting a habit of systematic calculation. In the preface, he states his conviction that Daniel's word is 'in very deed the Word of God,' but his analysis proceeds by assigning precise dates—down to the day—to prophetic periods. For example, he dates Daniel's mourning to 'Saturday, March 31st, B.C. 536' and the Passover to 'Thursday, April 12th.' This specificity is typical of the book's style: it treats biblical chronology as a puzzle to be solved with arithmetic rather than allegory.

Sayce's introduction praises the book as 'clear and to the point,' and notes that 'any other system of computation ends only in difficulties.' The collaboration between a civil engineer and an Oxford professor of Assyriology gives the work an unusual interdisciplinary character, though the excerpts show that the engineering voice dominates.

The 1290 Days and the End of Prophecy

The book's most distinctive thesis is that the 1290 days of Daniel 12 terminated in A.D. 33, aligning with the crucifixion and the early church. Auchincloss divides the 'one week' of Daniel 9:27 into two halves of 3½ years each: the first covering Christ's ministry, the second extending to A.D. 36. He argues that the latter half saw 'remarkable growth in the infant church' until persecution set in under Pilate. This interpretation makes Daniel's prophecies historical rather than futuristic, a stance that Sayce calls 'a great advance on previous interpreters.'

To support his timeline, Auchincloss cites Josephus's figures for the siege of Jerusalem—1,100,000 dead and 97,000 captive—and links the 'desolations' of Daniel to the Roman destruction in A.D. 70. He also connects the outpouring of the Spirit in Joel 2 to the events of Acts 2, arguing that Daniel's vision of the 'coming of the Holy Spirit' was already fulfilled.

Obliterating Divisions: A Radical Reading Strategy

In a striking methodological note, Auchincloss instructs the reader to 'obliterate' all chapter and verse divisions from Daniel 10 onward, treating the text as a continuous account of what Daniel 'saw and heard by the side of the great river, which is Hiddekel.' This directive reflects his conviction that the original prophetic experience was a unified vision, not a segmented text. He compares Daniel's experience to that of 'the apostle John and the apostle Paul,' suggesting a typological link between Old and New Testament visions.

The book also pays close attention to the physical setting: Daniel's location 'by the side of the great river' (the Tigris) and the precise dating of his mourning period. Auchincloss notes that the Passover occurred during this time, implying a liturgical layer to the chronology. The result is a reading that is at once literal, chronological, and typological, blending engineering exactness with theological interpretation.

Readers should approach The Book of Daniel Unlocked as a period piece in the history of biblical interpretation, not as a modern scholarly commentary. Its value lies in its transparent method and its willingness to make specific, falsifiable claims. The book's brevity—under 26,000 words—makes it accessible, but its dense chronological arguments reward careful rereading. Those interested in the intersection of 19th-century science and religion will find Auchincloss's work a revealing document.