Thanks to you both.
After I posted I loaded the latin text into the Firefox search engine, and found 'Old age has some things at least that are not to be despised; experience comes with riper years', though I think that's added a few words. It is identified as Ovid,
Metamorphoses 6.28-29, and was found at
https://laudatortemporisacti.blogspo...xperience.html.
I'll use this search technique more often.