He subsequently lived at Bückeburg, and died at Stadthagen in Schaumburg-Lippe on 10 July 1892.

[1] Westphal devoted his life in translating and interpreting the works of Aristoxenus.

He then applied Greek theories of poetic meter to eighteenth- and nineteenth century music.

[2] Westphal was a man of varied attainments, but his chief claim to remembrance rests upon his contributions on Greek music and metre.

His chief works were: He made translations of Catullus (1870) and of Aristophanes' Acharnians (1889), in which he successfully reproduced the Dorisms in Low German.