References
- A chart of the South Atlantic now in the Map Library of the British Library, Reference Division, London (Add MS. 5415 c.l.).
- The author is indebted to the owner, Mr. Dudley K. Barnes for allowing him to examine the chart and to reproduce a part of it.
- British Library. Add MS. 10041.
- Newberry Library, Chicago. Ayer MS. 22.
- National Library, Florence, Portfolio 11.
- British Library, Add MS. 1864‐B.