360 
CAPTAIN E. W. CREAK ON THE MAGNETICAL 
shoal lies, but none of those brought from Port Walcott showed any signs of 
magnetic susceptibility (see Appendix B). 
Professor Judd, F.R.S., has been also kind enough to look over the geological 
paper, and he writes : “ The only possible chance I can see for other conclusions ” 
(he had previously considered from Appendix A that there was no geological 
formation to account for the magnetic phenomena) “ is, that the term quartzite is 
used for volcanic rock, or that ironstone dykes are really a decomposed igneous rock 
(basaltic diabase) which at a slight depth would be found to show then’ normal 
magnetic character/’ 
In conclusion, I would remark that the highest credit is due to Lieutenant 
Combe, R.N., who, under Captain Moore, had charge of the magnetic observations. 
There is no link missing in the chain of evidence as to their completeness in every 
detail. The management of the ship during the survey of the magnetic shoal was 
fully fitted to a successful issue. 
I have to thank Professors Pucker and Judd for valuable assistance with reference 
to Appendices A and B. 
It is evident, from the scant but well authenticated reports from different parts of 
the world, that there is much to be done in the direction of ascertaining the position 
and dimensions of local magnetic disturbances of land under the sea, and it is hoped 
that what has been done by the “ Penguin ” will be a source of emulation to others 
whose lot is cast in a seafaring life. 
