It is in fact an entourage crossing the Perak River. This picture was taken in 1913, and can be found in the G.C.V.O. booklet. The booklet records the celebration week that to place to mark the award of the Sultan of Perak with the Royal Victorian Order (Grand Cross of the Victorian Order, or G.C.V.O.), which carries the title Sir.
The second elephant, the Sultan’s Elephant, carried Captain Oliver – who conveyed the Insignia to His Excellency the High Commissioner.