This item contains the following pieces of correspondence and related materials:

1. 4 May 1975. Typewritten letter to Johnson discussing planned mineral collecting excursion to Broken Hill in New South Wales, and Olary in South Australia, and requesting information about mineral collecting around Broken Hill and Olary. Attached to the letter is a one page draft itinerary for the excursion. Three pages.
   
   
2. 21 July 1975. Typewritten letter to Johnson enclosing a list of references relating to the Weekeroo meteorite and an abstract of a contribution to a meeting of the Meteorological Society (no longer attached to the letter), and discussing Chalmers' work on australites and progress on the publication of the Catalogue of South Australian Minerals. Two pages.
   
   
3. 29 July 1977. Typewritten letter to Johnson discussing mineral specimens, field collecting, and research into the age of australites. Two pages. Attached to the letter is a one page typewritten note, dated 1 August 1977, asking for comments on attached papers, and two papers relating to the age of australites. One paper, titled 'Age of Fall of Australian Tektites (Australites)' and dated 17 May 1977, discusses the debate over the estimated date of australite falls. The second paper, a manuscript titled 'Australasian Microtektites and the Stratigraphic Age of the Australites: A Reply', was prepared as a reply to be published with a paper written by B P Glass in 1977.
   
   
4. 29 August 1977. Typewritten letter discussing age of Australites and requesting information about mineral occurrences. One page.
   
   

Australian locations mentioned in this correspondence include Broken Hill (NSW), Olary (SA), Weekeroo (SA), Port Campbell (VIC), Lake Torrens (SA), Tanunda (SA), Moorabie (NSW), Yanco Glen (NSW), Charlotte Waters (NT), Simpson Desert (NT), Myrtle Springs (SA), Lake Wilson (SA), Lake Frome (SA), Lake Eyre (SA), Birdsville Track (SA).

Individuals mentioned in this correspondence include John McAndrew, Ron Wilson, Lin Sutherland, Don H McColl, Jack Pixley, Brian Mason, TE Bunch, Ed Olsen, June Scrymgour (see SAMA 897), Lindsay Russell, BP Glass, EP Henderson, Dr George E Williams, G Baker, RA Callen, RH Tedford, RS Clarke, JF Wosinski, RF Marvin, I Friedman, RL Fleischer, PB Price, RT Woods, W Gentner, D Storzer, GA Wagner, RK Johns, NH Ludbrook, John F Lovering, I McDougall, CR Twidale, JB Firman, D King, RA Callen.