How do I get a leads associated 'Quick Notes' using the API?

I have a requirement to list notes associated with a lead in an application outside of Zoho using the API. I can get the lead information but the notes seem to be contained in a "Quick Notes" field, see below. This seems to be a unique identifier, but I am note sure how to get the list of notes.

Does anyone know how to return the list of notes please?

< FL val="Quick Notes" >

https://crm.zoho.com/crm/private/xml/Leads/getMyRecords?authtoken=[API TOKEN]&scope=crmapi&newFormat=2&selectColumns=Leads(Lead%20Owner,First%20Name,Last%20Name,Company,Designation,Email,Phone,Fax,Mobile,Website,Lead%20Source,Lead%20Status,No%20of%20Employees,Annual%20Revenue)

<response uri="/crm/private/xml/Leads/getMyRecords"> <result> <Leads> <row no="1"> <FL val="LEADID"> 640692000009318001 </FL> <FL val="SMOWNERID"> 640692000001362005 </FL> ...