Ogof Marros surveys
Sketch of Antonias grotto. Freems, 2015. 
Survey additions. Email conversations. Date unknown. 
Sketch of three tier rift, terminal chamber and digs. 2015 ish. 
Crude dig additions. Email conversations. 
Email conversation about cross-section of geology. 
General trends of known caves. 
Mix of surveys. Email conversation. 
The flying pig report and or theory. 
Butchered survey of the terminal choke area. 
Survey of Antonias grotto. Michael Perryman and Antonia Freem. (If memory serves.) 
First sub grade survey of Marros made on the second day of discovery with Dr Ash Pursglove. Made with a broken compass and tape measure. Shows original route to 'Long in the tooth' through boulder choke.