Tobold was a well-respected gardener, most notable for his discovery and cultivation of the herb Pipe-weed, circa TA 2670, 1070 by Shire Reckoning. He resided in the Southfarthing village of Longbottom, and there he was immortalized as 'Old Toby'. The Pipe-weed variety 'Old Toby' was definitely named after him, and possibly 'Longbottom Leaf' as well. According to Herblore of the Shire, by Meriadoc Brandybuck, it was believed that Tobold Hornblower learned about Pipe-weed in Bree, as that was the farthest from the Shire that he traveled and the herb grows on the south slopes of the hill there. His date of death is not recorded but it is possible that he died sometime in the twenty-seventh century of the Third Age.