More Quotations and Proverbs

When black snails cross your path,
Black clouds much moisture hath.
(Benham's "Book of quotations" 1859 - 1944)
In Scotland the term "snail" is often used to refer to "slug" and it is thought it is so used in this context.

'It is perhaps a more fortunate destiny to have a taste for collecting shells than to be born a millionaire.  Although neither is to be despised, it is always better policy to learn an interest than to make a thousand pounds; for the money will soon be spent, or perhaps you may feel no joy in spending it; but the interest remains imperishable and ever new.'

from Lay Morals, by Robert Louis Stevenson 1850-1894.