No interactions present.
Again, quite acceptable according to Web sources.
Gosse (1860) see http://www.ispot.org.uk/node/347374#comment-120212 describes it well as "..pure snow white...opaque.." and mentions a 'warty column" which I cannot see.
However, other (modern) WebReferences are definitive enough for my agreement.
and on this delightful Dutch site
Lat/Lng: 51.6083, -4.3131
OS grid ref: SS399924