Lofty Mountain, Cavernous Valley) is a biographical play by Dhirubhai Thaker based on life of Manilal Dwivedi.

[1] Dhirubhai Thaker writes in the Preface of the play: The facts concerning Manilal's public and private life, his views, his ideals, and other resources were available to me, but I didn't know how difficult it is to turn that material into a drama until I was actually writing the drama.

[1] Critic Vinod Ardhvaryu notes, "As Dhirubhai has researched Manilal Dwivedi's literature very deeply, the play is accurate and true in its details".

[2] On 28 July 1992, theatre critic S. D. Desai wrote in The Times of India that the play lacks central conflict, its dialogues are verbose and its plot is just 'episodic'.

Hasmukh Baradi admires the play and writes, "the play Uncho Parvat, Undi Khin is a product of out own land, as it follows our own tradition of the theatre and employs that tradition in a modern way".