back contents forward {{frabfp098.png}} || eagles of the sky || the heavens as well as they could be covered when he was so surrounded by those strange mangrove islands and discovering no sign of any cruising, spying crate, he bade Perk goodbye and taxied in the direction of the open gulf, which he knew lay due west. Perk answered his signal ere the amphibian turned a bend in the tortuous channel and saw Jack vanish from view; nor could he long detect any sound to indicate the presence of an airship since cautious Jack had again made use of that wonderful "silencer" which they had found so useful while conducting their search during the preceding night. Then the appointed guardian of the captured contraband sloop turned his attention to matters which had to do with his making the tied-up craft as thoroughly invisible from the upper air as he knew how. [[98]] back contents forward