mathurā-māhātmya - giving a description of the greatness of Mathurā; śāstra - books; saṅgraha kariyā - collecting; lupta-tīrtha - lost holy places; prakaṭa - discovering; kailā - he did; vanete bhramiyā - traveling within the forest.

Śrīla Sanātana Gosvāmī collected some books about archaeological excavations in Mathurā, and wandering in the forest, he sought to renovate all those holy places.