 Wall was an activist for sound forestry management and was well known for his knowledge of geology and as a champion for mining and miners when he served in parliament.Gold production peaked in Australia in 1903 at around 130 tons (about 30% of total world production), so, Wall's activity coincided with the period of greatest Australian interest in gold mining.After his parliamentary service, his Megalong Valley enterprise and his discharge from bankruptcy on 19 Nov 1901, Wall's activity switched back to the Mudgee area.