Hi Steve,
I notice from your Email address you are a serving member of the RAN. Here are some leads.
The RAAF's Air Power Study Centre here in Canberra has just published a new book 'Australian Fighter Aces 1914-1953' by A D Garrison. It has a 5-6 page bio on Little.
Try
http://www.dod.gov.au/apsc/ for a look or to order it.
A good source with a fair bit on Little is Military Aircraft of Australia 1909 -1918 by Keith Isaacs. It can be found around the 2nd hand bookshops or check out the Defence Library system for a copy.
Drop me a line if I can be of any more help.
Cheers