New verb principal part?

[Donald M. Lance]

James Smith wrote:

> A collegue who was originaly from Oklahoma had me
> confused for a long time as he spoke of men doing
> their "tower" at work.  I finally realized he was
> speaking of a "tour", as in "tour of duty".

More likely an oilfield term that had spread into more general use.  I'm sure my brother
talked about daytime, evening, and midnight towers (shifts) on oil rigs when he was a
roughneck in the early 1950s in Texas.
DMLance