The squadron's commander, Admiral Mårten Anckarhielm, explained he had been given orders from Christina, Queen of Sweden not to lower the Swedish flag to any foreign power.

Roebuck, whose commander had already warned Anckarhielm that combat would ensue if his ships did not lower their colours, fired shots at the Swedish convoy before nightfall forced him to end his pursuit.

He sailed out with several warships, including St Andrew, Garland, Convertine and Mary Rose, arriving at where Anckarhielm's ships had anchored near Boulogne-sur-Mer on the morning of 3 May.

Initially, the Swedes denied engaging with the English at all, but eventually admitted to firing at Owen's ships, mostly due to the strict orders they had received from Queen Christina.

[5] The following day was spent with the gathering of testimonies and copying the commissions, with the Swedish commanders being treated with respect but also held as prisoners aboard Batten's ship.