Jimgrim by Talbot Mundy

Captain Henri de la Fontaine Coq was of the type that impudently upsets calculations, having genius for seeing flaws in rules, but seldom profiting by it, except in excitement, which is some men's standard of value. And as alcohol makes some men brazenly indifferent to consequences, so excitement made him icily remote from prudence. He had calm eyes that observed everything, feared nothing except boredom, and appeared to be quietly laughing at the absurdity of caring two sous whether the sun should rise or not tomorrow morning. We amused him. Baltis amused him immensely. It intrigued him beyond laughter that no one had remembered to stipulate what his movements should be while in India; that Nepaul is closed territory into which no alien may enter; that there was actually no order in council or any other published rule (since nobody had thought of it) forbidding foreign 'planes to fly into Nepaul.

The appointed rendezvous was to the north of Delhi, on a maidan where the jungle, that has overgrown the ancient city, lies hedged around with ruins. It was a landing place that called for iron nerve, because of broken masonry that had been piled in heaps as part of an abandoned scheme for clearing the whole area; but it was easy to see from the air and had the additional advantage that there were no dwellings near it except those of criminals who make their hives among the ruins.