Explain with reasons: Only trained persons, who are duly qualified can take up the tasks involved in the work of conservation and preservation.

Reason: sources of history are rare and delicate, and handling them needs special knowledge and skills.

• Collecting sources of history, making their records and indexes, and exhibiting manuscripts, old books and artefacts require very careful handling.
• Documents and artefacts have to be cleaned and treated by mechanical and chemical processes for their conservation.
• For this, one needs knowledge of old scripts like Brahmi and Modi, of types of paper, ink and colours, of stones and metals, and of the equipment and chemicals used for cleaning and preservation.
• One wrong step can damage a rare source permanently.

Hence only trained and duly qualified persons can take up this work.