MRCS Eng 1857.
Larmuth studied medicine at Pine Street Medical School in Manchester before settling in general practice in Sale-Moor, Cheshire. Some time after the late 1870s, Larmuth moved to Guernsey. Leopold Larmuth (see below) was his nephew. Larmuth died on 28 June [18-?], there is a commemorative plaque at Manchester Crematorium (see MMC/2/LarmuthL/1/6).