That's a tough one (or two)
First image
(England)
Date illegible OC 30th [ ___] [?] Seconded to join No 3
Entrenching Bn [Battalion] 3rd Army 30 /10 / 15
Joined [ ?] 31 / 10 /15
Joined unit Field 22 / 1 / 16
Second image
3 / 5 /15 OC
Australian
Voluntary
Hospital
[?] J X
Date illegible 5 / ? / ?? OC
No 3 Amb[ulance]
Ship