After S.J.F. Krebs ' death , his widow married a chemist named Carl Hansen .
It was commanded by Niels Juel , had a crew of 568 men and was equipped with 86 canons .
After S.J.F. Krebs ' death , Niels Juel 's widow married a chemist named Carl Hansen .
It was commanded by Niels Juel , had a crew of 568 men and was equipped with 86 canons .