The Leutwitz Apollo discrepancy

In "1993-94 [Ernst-Ulrich Walter] recovered the statue's remaining fragments" from the Leutwitz estate (p. 54).

Yet Lucia Marinescu claims, in a 2004 publication, that she saw the statue in 1992.

Why did Michael Bennett fail to address this significant discrepancy? Why did Marinescu claim in a letter (September 2003) that she saw the statue in 1994? Or did Bennett misquote Marinescu's letter?

What is the evidence for due diligence?

Perhaps the Cleveland Museum of Art could release the letter and place it on its website for public scrutiny.