Dear Ms. Wright-Cleveland,
Thank you for posting your request on History Hub!
In addition to the information from the previous poster, we suggest that you contact the John F. Kennedy Presidential Library to search their Hemingway-related collections for the information you seek.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this is helpful. Best of luck with your research!