On 19 May she wrote in code that the English were mining at the Citadel , St Anthony 's Flanker , and the Mill Bulwark .
Mary of Guise sent letters to d'Oysel describing what her spies had found out about these works .
On 19 May Mary of Guise wrote in code that the English were mining at the Citadel , St Anthony 's Flanker , and the Mill Bulwark .
Mary of Guise sent letters to d'Oysel describing what her spies had found out about these works .