Appell function proofs of recent and old mock theta function identities

In this note we give new proofs of two recent mock theta function identities discovered by Garvan and Mukhopadhyay. We also give a new proof of an old mock theta function identity of Watson. Using the setting of Appell function properties as first introduced and developed by Hickerson and Mortenson, we demonstrate that the identities are similar to certain tenth-order and sixth-order mock theta function identities found in Ramanujan's lost notebook. Our approach suggests more identities like those of Garvan and Mukhopadhyay.