Although there is no direct evidence that Harriot made this voyage, Quinn in argues convincingly that he was one of those making this preliminary survey. Harriot was certainly on a voyage to Virginia organised by Raleigh in 1585-86.
Kahit na walang direktang ebidensiya na Harriot ginawa ito paglalayag, Quinn sa argues convincingly na siya ay isa sa mga paggawa ng paunang pagsisiyasat na ito. Harriot ay tiyak sa isang paglalakbay sa Virginia organised by Raleigh sa 1585-86.