The Nine Unknown by Talbot Mundy

That night there stood in front of Cyprian's an ox-cart, tented and painted to resemble the equipage of old-fashioned country gentry's womenfolk. Chullunder Ghose had conjured the thing from somewhere, magnificent Guzerati bullocks included, selecting the form of conveyance least likely to be interfered with by police.

But to make assurance on that ground doubly sure there was Narayan Singh as driver, naked of leg and otherwise garbed as a Hindu, reenforced by Ramsden and two of Ali's sons, the latter shaven, and so angry at having to adopt Hindu disguise that it would have called for a whole squad of "constabeels" to arrest them.