Capt. W.G. Stairs to William Mackinnon. reports interview with King Leopold over Congo affairs; Leopold anxious about South African Cos. [companies] attentions to Katanga copper, disposed to accept Lord Salisbury's assurances, wanting H.H. Johnstone reprimanded or removed; Stair's concerned about prevention of enlistment of men in Zanzibar by Br. Consul; fears Rhodes' pressure on Lord S.; Leopold or advisors doubt feasibility of Nyassa or Congo route.