William Strong, Mattingly v. District of Columbia…
“ There were also acts of the legislative assembly of the District, which very forcibly imply a confirmation of the acts and assessments of the board of which the bill complains. If Congress or the legislative assembly had the power to commit to the board the duty of making the improvements, and to prescribe that the assessments should be made in the manner in which they were made, it had power to ratify the acts which it might have authorized. ”
