This item contains the following items of correspondence:

1. 31 March 1980. Typewritten letter to Johnson discussing exchange of mineral specimens, enclosing 3 page list of minerals for trade. Four pages.
   
   
2. 25 June 1980. Typewritten postcard to Johnson. One page.
   
   
3. 18 October 1980. Typewritten letter to Johnson discussing collecting trip to New Mexico, USA, and enclosing 2 page list of minerals for trade. Three pages.
   
   
4. 20 October 1980. Handwritten list of mineral specimens, with the heading 'Sent to Wilf Baldwin'. Some items on the list are marked with a red cross. A handwritten note at the bottom of the list reads 'all marked with red x, sent Oct 20, 1980'.
   
   
5. 6 November 1980. Typewritten letter to Johnson discussing micromount collectors in Australia and New Zealand, and the exchange of mineral specimens. Attached to the letter is a typewritten postcard to Johnson dated 31 December 1980, acknowledging receipt of micromount specimens and mentioning communication with micromount collectors in New Zealand. Two pages.
   
   
6. 8 April 1981. Typewritten letter to Johnson discussing attendance at a mineral show in Tucson, Arizona, USA, and enclosing 3 page list of minerals for trade. Four pages.
   
   
7. 24 April 1981. Handwritten list of minerals and the locations they were found at, written headed 'Wilf Baldwin to April 24, 1981'. One page.
   
   
8. 10 May 1981. Typewritten letter to Johnson discussing mineral specimens exchanged. One page.
   
   
9. 5 June 1981. Typewritten postcard to Johnson discussing mineral specimens exchanged. One page (double-sided).
   
   
10. 7 September 1981. List of minerals handwritten on both sides of an opened envelope addressed to Johnson. Each item on the list is preceded by a four digit number, ranging sequentially from 3094 to 3135. Three of the items in the list are also listed separately under the heading 'Wilf Baldwin, Sept 7, 1981'. One page.
    
    
11. 15 October 1981. Typewritten letter to Johnson discussing mineral specimen exchange. One page.
    
    
12. 12 December 1981. Typewritten letter to Johnson discussing correspondence and mineral specimen exchange. One page.
    
    
13. No date. Piece of paper measuring 14.0x17.5 cm, bearing handwritten note headed 'Wilf Baldwin' and listing minerals. A handwritten note at the bottom reads 'sent Oct 20, letter Oct 15'. One page.
    
    

Australian locations mentioned in this correspondence include Reaphook Hill (SA); Mt Gunson Mine, Woomera (SA); Broken Hill (NSW); Moonta (SA); Flinders (VIC); Yowah (QLD); Dundas (TAS); Mt Widderin (VIC); Mortlake (VIC); Moline (NT); Narre Warren (VIC); Dome Rock (SA); Kadina (SA); Rum Jungle (NT); West Bogan Mine, Tottenham (NSW); New Mexico (USA); Walcha Road (NSW); Balhannah (SA); Glen Innes (NSW); Mount St Hilaire (Canada); Callington (SA); Spalding (SA); Tolwong (NSW); Preamimma (SA); Mutooroo (SA); Iron Knob (SA); Olary (SA); Clinton (SA); Lake Gilles (SA); Buckleboo (SA); Skipton (VIC); Wallace Gully Mine, Freeling Heights (SA); Collingwood (VIC); Glen Osmond (SA); Wallaroo (SA); Moculta (SA); Harquahala Mine, Arizona (USA); Glen Innes (NSW); Cockburn (SA); Mount Gunson Mine (SA); Unanderra (NSW); Callington (SA); Eukaby (SA); Cloncurry (QLD); Moculta (SA); and Moline (NT).

Individuals mentioned in this set of correspondence include Ray DeMark, H A Mitchell, Liz Radford, Peter Elliott, Ruth Jacobsen, Dr Frondel, Fred Pough, Dick Bideaux, Harold Lamb, Dr Alex Knoll, Ray Wreggett, Hannes Rose, Neal Yedlin, and Bill Henderson.