"It is one hell of a story," the Doctor replied. But then again, most of his adventures were. His motivation for telling the Master this was not to entertain him (although, the Doctor imagined the Master would be entertained), or even to inform him about this little tidbit of information. No, he hoped the Master would understand, that somebody who had been sent to kill him could be accepted by him, even to the point of becoming his wife, and the Master might find some sort of solace in this.
Hands intertwined, the Doctor then gave a tug, meaning to pull the Master up to his level, so that they were now standing side by side, close together. He then looked contemplatively at the journal in his other hand, then up again at the Master.
"River also kept a journal. It was to keep track of when our timelines crossed, to check and see where we were, so we wouldn't slip and spoil one another's future. But I know she wrote a lot more. Full of personal thoughts and observations, including what she thought of me. I never read it. I had the chance, but I respect her privacy. Just like I'll respect yours." He then handed the journal back to the Master. "If you want to share what Missy wrote, then that is your choice.</i>"
The Doctor wondered, but was also filled with trepidation as to what Missy had wrote.