In 1922 he went into the Works Services in India as garrison engineer at Kohat and then at Khaisora which is today in Pakistan.
Another, superior type, was developed by Millis Jefferis of MD1 known as the "Lead Delay switch" or officially "Switch, No. 9, L Delay".
Millis Jefferis | Nancy Millis | Joshua Jefferis | Barbara Jefferis Award | Alfred Jefferis Turner |