2. Bertie had several people working for him: a private secretary, an administrative assistant, and a research aide. (list)
3. Bertie avoided making appointments at inconvenient hours: before 10:00 AM or after 2:00 PM. (explanation)
4. Bertie developed some new pastimes: golfing, working out in the gym, and going to afternoon ball games. (list)
5. His administrative assistant Babette Buxton figured him out within a week: he never did any work, so he never got blamed for anything. (explanation)
6. Babette followed her boss's example: when he left for the day, she disappeared. (explanation)
7. Bertie's secretary Miss Paxton had to do the work of three: her own, Babette's, and Bertie's. (list)
8. That was Abigail Paxton's preferred title: Miss Paxton. (explanation)
9. In Bertie's absence Miss Paxton ran the office, made executive decisions, and gave herself a nice raise. (no colon here--" In Bertie's absences Miss Paxton" is not a grammatically complete statement.)
10. Miss Paxton had the thing she really craved: power. (list)