Letters written to Mr Garner and Mr Richards from John Johnstone. He was a diver and was wondering if he could talk to the students about salvage work from the oceans. Talk titled "Salvage from the Sea" and tells of how over eight tons of gold was recovered from the wreck of the R M S "Niagara" off the coast of New Zealand.2 hand written letters on beige writing paper - thick Brochure - blue and white with blue printing.Signature on letters John E Johnstoneballarat junior technical school, head master, l garner, school of mines and industries, r richards, principal, john e johnstone, salvage from the sea, r m s niagra, gold bullion, new zealand coast, film screening for school