Scotlands warning, or a treatise of fasting : containing a declaration of the causes of the solemne fast, indyted to bee kept in all the Churches of Scotland, the third and fourth sundayes of this instant moneth of May Anno 1628.& the weeke dayes betwixt them, as they may be goodly keeped in Townes. Together with a direction how to proceed in the religious obseruation of any soleme fast. Written at the appointment of superiors by Mr. W. Struther, preacher of the Gospel at Edinburgh.