Complex sentence: Although his methods were crude by today's archaeological standards he was a great archaeologist and recorded everything in great depth, although was responsible for removing many artefacts which can be seen in the British Museum and many other places around the Globe to this day.
Split into simpler sentences: Although his methods were crude by today's archaeological standards he was a great archaeologist and recorded everything in great depth. He was responsible for removing many artefacts which can be seen in the British Museum and many other places around the Globe to this day.