 Early the following year, he left his post to return to full-time programme-making, leaving him free to write and present the planned natural history epic.After his resignation, Attenborough became a freelance broadcaster and immediately started work on his next project, a pre-arranged trip to Indonesia with a crew from the Natural History Unit.It resulted in the 1973 series "Eastwards with Attenborough", which was similar in tone to the earlier "Zoo Quest" but without the animal-collecting element.