Long ago, perhaps 40-50 years ago, I read a paper or book that contained advice about how to write and publish mathematics that contained a certain quip (below). Perhaps it was something published by the AMS, or perhaps it was written by Paul Halmos. Anyway, although I've tried, I've not been able to find it again. In my (admittedly deficient) memory, it went something like this:
Do not attempt to publish case x of a theorem in the year 1950+x.
Does anyone recognize this and know the source?
The statement is in Halmos, What to publish, Monthly January 1975, Page 15. "Do not publish in 1975 the case of dimension 2 of an interesting conjecture in algebraic geometry, one that you don't know how to settle in general, and then follow it by dimension 3 in 1976, dimension 4 in 1977, and so on, with dimension $k-3$ in 197k."