Page 27, 31: The (minor) differences between the texts in the charts and those in the transcriptions as printed in the source document have not been rectified.
Page 146, quote from L’Enfant, and Page 27 (transcription from chart): the minor differences between the quoted text and the map have not been rectified.
Page 201, By a resolution adopted February 29, 1847 ...: 1847 was not a leap year.
Transcriptions of Page 21: Texts |between vertical bars| was illegible in the source document, and is a best-guess interpretation.
Changes made
Illustrations have been moved outside text paragraphs.
Some obvious minor typographical, spelling and punctuation errors have been corrected silently.
Where relevant and possible notes, explanatory texts, legends, etc. from illustrations have been transcribed separately; these transcriptions may be found through the hyperlinks underneath the illustrations. In these transcriptions, most of the (sometimes elaborate) formatting has been ignored.
Page 42: It was erected by Mr. Blodget ... changed to It was erected by Mr. Blodgett....
Page 252: Alexander B. Trowridge changed to Alexander B. Trowbridge.