Which of the following is incorrect about John Marshall?

While excavating Marshall paid attention to the stratigraphy of the site.

In fact, John Marshall’s stint as Director-General of the ASI marked a major change in Indian archaeology. He was the first professional archaeologist to work in India and brought his experience of working in Greece and Crete to the field.  Marshall tended to excavate along regular horizontal units, measured uniformly throughout the mound, ignoring the stratigraphy of the site. This meant that all the artefacts recovered from the same unit were grouped together, even if they were found at different stratigraphic layers.