What were the differences in the techniques adopted by J. Marshal and R.E.M. Wheeler in studying Harappan civilisation?

What were the differences in the techniques adopted by J. Marshal and

1.	What were the differences in the techniques adopted by J. Marshal and R.E.M. Wheeler in studying Harappan civilisation?
Answer» Solution :John Marshal TENDED to excavate along regular horizontal units, measured uniformly throughout the mound, ignoring the stratigraphy of the site., all the artefacts recovered from the same UNIT were grouped TOGETHER, found at different stratigraphic layers. Valuable informationabout the context was irretrievably lost. R.E.M. Wheeler recognised that it was NECESSARY to follow the stratigraphy of the mound rather than dig mechanically along UNIFORM horizontal lines.