So sorry Paul but there are no H.R. records available. I do believe that some of the people who worked there often lived either on the property or with other families in the area. I know that some of the nurses did live on the grounds. Would the census help? We do have copies of a few old photos of the grounds and some of the nurses/doctors from the 1950s, but no other staff is shown. I wish you luck with your search. I would be interested to know if you learn anything new.