What is a bulbul's nest made of?

I had to chop off one of the Ashoka trees some days back. The winds and the rains broke the trunk and the whole tree fell over our neighbors flower pots. An Abandoned bulbul's nest was also found. It is not exactly a very interesting sight , but I thought it would be interesting to take it apart and do a 'forensic analysis' of it. what type of twigs are used, how many are used. etc..