Cir­ca, 1875, Penn­syl­van­ia.

Af­ter 1948, Los An­ge­les, Cal­i­for­nia.

Trowbridge ev­i­dent­ly con­duct­ed an or­ches­tra in Los An­ge­les at one time. His works in­clude:

• Choir Con­duct­ing (Day­ton, Ohio: Lo­renz Pub­lish­ing Com­pa­ny, 1935)

1. Christ Alone Has Pow­er to Save

1. Savior Who Loves Me, The
2. San Luis Rey