Chaim and Yael Zorach's children will join the Time Patrol. Manse Everard reflects:
"If not...could you stand it, watching them grow old, suffer the horrors that will come, finally die, while you are still young of body." (p. 247)
The phrase that attracts my attention here is "...the horrors that will come..." Poul Anderson's Time Patrol series was published from 1955 to 1995, this instalment in 1983. Anderson avoided describing any near future events and this paid off. The series has not become dated by specifying any "horrors" that have not come to pass, e.g., in the 1990's or in the early twenty-first century - but it was a safe bet that there would be horrors. In 2025, we have experienced and are still experiencing them. Anderson was able to leave it vague and yet get it right. The Time Patrol could still be part of our timeline - and yet no, it could not, because, in the Patrol's timeline, Sherlock Holmes was a real person! Also maybe Cyrus the Great was not really a Zoroastrian? Changes in historical understanding can date time travel fiction.
In any case, the "...horrors that will come..." is accurate.