While there are William Allen’s out there, none match Marc Jones dates of November 29, 1837 in Dundee Scotland. Jones gives a 7 AM rising making a 25 Scorpio Ascendant. Here Morinus corrects the problem that Placidus has with northern latitudes. . The first chart is Morinus in red and green; the second in purple and grey is Placidus.
Marc Jones only used Placidus so those following along in the Sabian Symbols in Astrology book will note that the personal information for William Allen is on page 344 and the astrological data in the middle of page 364.
He is a Bucket with a Jupiter in the Ninth Handle.