Not in Numeric Register. On Leave book as HJ, but in RIC as JH. In fact this man joins first as a ADRIC , get dismissed, then rejoins as a Black & Tan (and gets dismissed from that too) The Date of Birth in Dublin confirms
See J H Taylor
1901 Jan 6, Born Dublin (RIC)
1921 Apr 26 Joined RIC as a Black & Tan
1921 Aug 10. Dismissed RIC
1921 Joined ADRIC with service no ?. Posted to ? Coy