In November 2015 I came across a chronological list of Upjohn employees from 1897 to 1974, contained in two large binders. This was the official list used by Personnel in the days before computers. After 1974, information about employees was computerized. The list has been scanned and is available here in pdf format. I had to spilt it up into 21 separate files as shown below. The order is by employee start date. I've also shown the employee numbers in the links below.