Am not related but may be of interest to someone who is. I have no further info but additional may be found in Stockton Daily Independent newspaper extracts

Vern D
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Transcribed by Dee Sardoch
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Stockton Daily Independent
Stockton, San Joaquin Co., CA
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>>WEDNESDAY, 24 JUNE 1863<<

DIED -- in Columbia, June 17th, Wm. LETDER, aged 64 years, a native of England, and a resident of California since 1849.