This item contains the following correspondence:

1. 3 December 1978. Typewritten letter to Johnson discussing possible micromounted mineral specimen exchange. One page.
   
   
2. 14 January 1979. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
   
   
3. 4 March 1979. Typewritten letter to Johnson discussing mineral specimen collecting and exchange, and the Tucson Mineral Show. One page.
   
   
4. 16 June 1979. Typewritten letter to Johnson discussing mineral specimen exchange. Two pages.
   
   
5. 11 November 1979. Typewritten letter to Johnson discussing mineral specimen exchange and detailing specimens sent. Two pages.
   
   
6. 18 February 1980. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
   
   
7. 27 April 1980. Typewritten letter to Johnson discussing mineral specimen exchange with Australian collectors, specimens swapped with Johnson, and attendance at the Rochester Mineral Symposium. One page.
   
   
8. 24 June 1980. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
   
   
9. 27 August 1980. Typewritten letter to Johnson discussing mineral specimen exchange, and mineral collecting activities and conditions. Two pages.
   
   
10. 8 October 1980. Handwritten list of minerals headed 'Sent to Bill Henderson Jr'. One page.
    
    
11. 16 October 1980. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
    
    
12. 7 December 1980. Typewritten letter to Johnson discussing horseshoe crabs, trilobites, the occurrence of minerals, and mineral specimen exchange. One page.
    
    
13. 25 March 1981. Handwritten list of minerals with the heading 'Sent March 25 1981'. One page.
    
    
14. 12 April 1981. Typewritten letter to Johnson acknowledging receipt of Gem and Treasure magazine and discussing Henderson's erroneous description of Johnson as the Curator of Mineralogy at the South Australian Museum in the Mineralogical Record magazine (see also AA 159/3/3/13) and Henderson's mineral collecting activities. One page.
    
    
15. 17 May 1981. Typewritten letter to Johnson discussing mineral specimen collecting and exchange. One page.
    
    
16. 26 June 1981. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
    
    

Australian locations mentioned in this correspondence include Reaphook Hill (SA), Kapi Mine (TAS), Broken Hill (NSW), Angaston (SA), Coonabarabran (NSW), Preamimma (SA), Minyulo (WA), Wolfdene (QLD), Port Clinton (SA), Moculta (SA), Spring Creek (SA), and Avondale (NSW).

Individuals mentioned in this correspondence include Chris Johnston, Neal Yedlin, Paul Moore, Thomas McLaren, Col Price, Barry Porter, Paul Desautels, John White, Joe Mooney, Vince Piesley, Wendell Wilson, and Brian Beyer.