"Bonzo" is Knut Haukelid, another Resistance operative, who is
heading up the operation to sink the ferry. Through Skinnarland,
Haukelid is passing on what he's heard from one of the partisans'
most valuable contacts inside the plant, Kjell Nielsen, Vemork's
transport engineer. Nielsen believes the amount of useful heavy
water the Germans would be able to secure from the Norwegian
stocks is not worth the inevitable reprisals on locals. As the
transfer of the heavy water is set to begin in three days,
Skinnarland requests an immediate response from London.