More than 15 miles lay between the relieving rebel fleet and Leiden , but ten miles were covered without difficulty .
However , only by the first day of September , when the Prince had recovered from his ailment , did the expedition continue in earnest .
More than 15 miles lay between the relieving rebel fleet and Leiden , but ten miles were covered without difficulty .
However , only by the first day of September , when the Prince had recovered from his ailment , did the expedition continue in earnest .