83 Consequently, in the four evangelists we find mention made of ten distinct appearances of the Lord to different persons after His resurrection. First, to the women near the sepulchre. Secondly, to the same women as they were on the way returning from the sepulchre. Thirdly, to Peter. Fourthly, to the two who were going to the place in the country. Fifthly, to the larger number in Jerusalem, when Thomas was not present. Sixthly, on the occasion when Thomas saw Him. Seventhly, by the sea of Tiberias. Eighthly, on the mountain in Galilee, of which Matthew speaks. Ninthly, at the time to which Mark refers in the words, “Lastly, as they sat at meat,” thereby intimating that now they were no more to eat with Him upon the earth. Tenthly, on the same day, not now indeed upon the earth, but lifted up in the cloud, as He ascended into heaven, as Mark and Luke record.
This last appearance, indeed, is introduced by Mark, directly after he has told us how the Lord showed Himself to them as they sat at meat. For his narrative goes on connectedly as follows: “So then, after the Lord had spoken unto them, He was received up into heaven.” Luke, on the other hand, omits all that may have passed between Him and His disciples during the forty days, and, after giving the history of the first day of His resurrection-life, when He showed Himself to the larger number in Jerusalem, he silently connects therewith the closing day on which He ascended up into heaven.
His statement proceeds in this form: “And He led them out as far as to Bethany; and He lifted up His hands, and blessed them; and it came to pass, that while He blessed them, He was parted from them, and carried up into heaven.” Thus, therefore, besides seeing Him upon the earth, they beheld Him also as He was borne up into heaven. So many times, then, is He reported in the evangelical books to have been seen by different individuals, previous to His completed ascension into heaven, namely, nine times upon the earth, and once in the air as He was ascending.
Source: The Harmony of the Gospels (New Advent)