Letters for a Cardinal?

Usage examples of stl.

The fans were stl too, although the weather had changed sharply overnight, the thick muggy air blown away and replaced by one of those clear blue-and-white days that were more spring than summer, so that, like Nadine, she wore a sweater buttoned over her blou ise.

There was no mention of current position--the family was recorded as being active in stl, slip, and rl-est.