At Surya Kund near Satopanth, at a height of 4,500m, there is still a cave where Sri Devpuriji meditated and had a vision and darshan (appearance) of Sri Alakhpuriji. There he got Sri Alakhpuriji’s blessings to awaken all the qualities of Lord Shiva within him. It is for this reason that Sri Devpuriji is revered as an incarnation of Lord Shiva.
Extract from the book "Lila Amrit - The Divine Life of Sri Mahaprabhuji":
Paramyogeshwar Sri Devpuriji meeting his Master Mahasiddha Avatar Sri Alakhpuriji
In the middle of the inaccessible mountain range of Sambu Panca Atala Akhara, there dwells the Omnipresent Supreme Brahman in the form of the hermit ascetic, Sri Alakh Puriji Maharaj. Lord Shiva of Kailash went to meet him at Badrinath-Dhama in the Himalayas. This meeting of both Divine manifestations was a blessing for the whole universe.
In order to rescue and liberate souls from the illusion of maya, Lord Shiva wished to embody himself in human form. Adhering to sacred law, he sought the consent of his Guru, Sri Alakh Puriji.
"Brahman himself you are, Lord of the Cosmos," Lord Shiva said to him. "I worship you as my Guru."
The great yogi blessed him.
"Shiva you are, the Supreme, Omniscient and all-powerful. From this day forth, you shall be known as Sri Devpuriji Maharaj."
Paramyogeshwar Sri Devpuriji resided in Sikar District, Rajasthan till the middle of 20th century. His Ashram "Kailash" in the Rajasthan carries the same name as the holy Mount Kailash in the Himalayas.
He is revered as an incarnation of Lord Shiva and he embodies all characteristics of Lord Shiva - Shiva is the saviour, the destroyer of bad and evil. Shiva is consciousness, purity and fire. Paramyogeshwar Sri Devpuriji is the giver of spiritual power, an incarnation of Divine Will and he represents the yogic consciousness. It was Lord Shiva who brought the wisdom of yoga to humanity. Sri Devpuriji is the Supreme, a mighty channel who bestows Light and Cosmic energy upon the earth. All the elements were under his control. It has been reported by eye-witnesses that he walked on water and could materialize or de-materialize his body according to his will. He directed fire and rain just as he wanted and wherever he went there remained no footprints on the ground. No material or astral power could hinder Sri Devpuriji; at any time he was able to come, protect and support his bhaktas.
Sri Devpuriji was like Lord Shiva, indeed - he could be immensely merciful but also very strict too. But even when Sri Devpuriji was angry, people felt blessed because God is never angry with us, only with our bad qualities. In his ashram at Kailash he held numerous wonderful satsangs (spiritual gatherings) which attracted people from all over India. So great was Sri Devpuriji's love for animals that he was constantly followed by a flock of cows, goats, birds, dogs, and snakes. When he held satsang, even the creatures of the jungle came out to listen to his words.
Sri Devpuriji left his physical form in 1942, and he passed on his spiritual blessings to one of the most divine incarnations of mankind, the Avatar, all knowing Siddha, Bhagvan Sri Deep Narayan Mahaprabhuji, an embodiment of Divine Love, Wisdom and Light.
The relationship between Sri Devpuriji and Bhagvan Sri Deep Narayan Mahaprabhuji was one of great unity and love. They were "two in body, but one in Atma". Sri Mahaprabhuji expressed his devotion towards his master in numerous poetic spiritual songs (bhajans). They describe the highest aim of yoga, the union with the omnipresent, eternal and divine Self.
from the Bhajan: "GAGANA MANDAL ME RASA RACHAYA" by Bhagavan Sri Deep Narayan Mahaprabhuji
More about Sri Devpuriji you can read from the book Lila Amrit - The Divine Life of Sri Mahaprabhuji