While reading a book on Cicero, I encountered the following passage:
I had to invent what is commonly called shorthand to cope with the flow, a system still used to record the deliberations of the senate, and for which I was recently awarded a modest pension. This, along with a few legacies and the kindness of friends, is sufficient to keep me in my retirement.
I want to ask about this phrase "keep in retirement". Does it mean he doesn't need to work and can thus remain retired, or does it mean he can sustain himself during retirement, or is it ambiguous?