Antedating of "Tooth Fairy"

[Kim & Rima McKinzey]

>---------------------- Information from the mail header
>-----------------------
>Sender:       American Dialect Society <ADS-L at LISTSERV.UGA.EDU>
>Poster:       Fred Shapiro <fred.shapiro at YALE.EDU>
>Subject:      Antedating of "Tooth Fairy"
>-------------------------------------------------------------------------------
>
>tooth fairy (OED 1977)
>
>1933 _Sheboygan_ (Wis.) _Press_ 13 Dec. 4  Whenever any of us lost a
>tooth, we carefully placed it in an envelope, together with a letter to
>the Tooth Fairy, telling what we desired in exchange for the tooth.

But when did the custom become putting the tooth under the pillow?

Rima