107. Use the comma to set off non-emphatic introductory words or phrases, and participial phrases.
"Practical Grammar and Composition"
Thomas Wood
I have noticed one who uses a Latin participial construction even at the breakfast table.
"Talks to Freshman Girls"
Helen Dawes Brown
Nevertheless, this making of nouns out of adjectives with the participial form is an irruption over the boundaries of the parts of speech which should not be encouraged.
"Essays Æsthetical"
George Calvert