This morning Whitelocke returned a visit to the Swedes' Ambassador, Bernelow, at his lodging, where he learnt of him the manner of the sitting of the General Diet of Germany, at which he was present:--That they have three colleges or chambers: the first is the College of the Electors, where they only assemble; the second is the College of the Princes, where the Archbishops, Bishops, Dukes, Graves, and Barons meet, to the number of about one hundred and forty; the third is the College of the Free Cities, where their Deputies, about two hundred, do meet. When they consult, the Chancellor of the Empire, the Archbishop of Mentz, sends the proposal in writing to each college severally. When they are respectively agreed, then all the colleges meet together in the great hall, at the upper end whereof is a chair of state for the Emperor. On the right-hand of the chair the Electors sit, on the left-hand the principal officers of the Emperor's court; on the right side of the hall, upon seats, are the Ecclesiastic Princes, Bishops, and Abbots; on the left-hand are the Temporal Princes, upon their seats; and on the seats below, one before another, are the Deputies of the towns. The Archbishop of Mentz, as Marshal of the College of the Electors, begins and reads the proposal, and the resolution thereupon in writing of that college; after him, the Marshal of the College of the Princes doth the like; and lastly, the Marshal of the College of the Free Towns, who is always the chief magistrate of the place where the Diet sits. If the resolution of the three colleges agrees, or of the College of the Electors and one other of the colleges, the business is determined accordingly; if the colleges do not thus agree, then they meet all together and debate the matter; whereupon, if they come not to an accord, the business is remitted to another day, or the suffrage of the Emperor decides it. Whitelocke asked him, whether the advice of the Diet, being the supreme public council, were binding to the Emperor. He said, that the Emperor seldom did anything contrary to that advice, but held himself bound in prudence, if not in duty, to conform thereunto. Whitelocke asked him what opinion they had in the Emperor's court of the present King of Sweden. He answered, as was expected, and most true, that they have a great opinion of the King, especially for military affairs. Upon Whitelocke's invitation, he did him the honour to dine with him, and they had much and good discourse together. [SN: Visit of M. Woolfeldt's brother-in-law.]