Hello ,

News to hand of bravery of a village lad who, while returning by the jungle path, came face to face with a tiger.

What is meanig of word in bold letters?

News to hand = recent available news
of bravery = about the bravery/courage
by the jungle path = along/via a trail through the jungle.
Students: Are you brave enough to let our tutors analyse your pronunciation?

Thanks for quick and mind blowing reply.

Is "by" here an adverb?

By is a preposition, Hanuman, but the prepositional phrase that it heads is an adverb.