In #10, Biggles is approached by Paul Cronfelt from a firm of Bullion Brokers called ‘Cronfelt & Carstairs’ with a proposition. Cronfelt wants him to set up an airline, a private venture with the primary object of carrying his companies’ freight, namely gold and jewellery. Biggles is initially reluctant but decides to accept after receiving a threatening phone call from Germany, warning him not to. Setting up business with Algy, Ginger and Smyth as mechanic, the company is called Biggles & Co. The first load of gold Biggles carries is stolen, but Biggles has replaced the gold with lead. Biggles then reverses his first ruse to fool the criminals a second time when they try to steal his second load of gold. Biggles also delivers the third load of gold safely but by now, Algy has disappeared.