Prithvi Narayan Shah captured Kathmandu and Patan in 1768 and Bhaktapur a year later.
Bhaktapur was captured before Patan and Kathmandu were. 
mnli hypothesis: Bhaktapur was captured before Patan and Kathmandu were.  premise: Prithvi Narayan Shah captured Kathmandu and Patan in 1768 and Bhaktapur a year later.