Complex sentence: Gradually Bolo became an intimate friend of Hilmi, and as such was present at some unusual court ceremonies, some of which he planned himself, for example one that was a reception for a Consul-General from one the European countries.
Split into simpler sentences: Gradually Bolo became an intimate friend of Hilmi, and as such he was present at some unusual court ceremonies, some of which he planned himself. One was a reception for a Consul-General from one of the European countries.