R. Miller mentions O. Cowdery's rebaptism by Hyde in November 1848 in a letter to H. Sabey.

Date: Nov 16, 1848
Type: Letter
Source: Reuben Miller
LDS
Hearsay: Direct
Reference: Reuben Miller, Letter to Henry Sabey, November 16, 1848, MS 88, Church History Library
Scribe/Publisher: Reuben Miller
People: Henry Sabey, Reuben Miller, Orson Hyde, Oliver Cowdery
Audience: Henry Sabey
Transcription: Brother Oliver Cowdery is here and has been baptized by Elder Hyde on last Sunday.
Source Link: https://catalog.churchofjesuschrist.org/assets/fc63d39f-2714-441f-a39e-3904a923e6ae/0/3
BHR Staff Commentary: This indicates that Cowdery was rebaptized on November 12, 1848.
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