Hi Althea,
The best history of this unit is Richard STOWERS' excellent Forest Rangers, published by the author in 1996. pb. 294pages. It includes biographical details of soldiers serving in the two companies, engagements, plus weapons uniforms and equipment.
The note for 'Clement A. CORNES' says only: "Original company; 11 August-10 November 1863. Private. Made land claim."
Do you want me to have a look for any information about him at Archives Wellington next week?
Regards, riley