Exhibit 24.2
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Mark D. Ein and L. Dyson Dryden her true and lawful attorney-in-fact, with full power of substitution and resubstitution for her and in her name, place and stead, in any and all capacities to sign any and all amendments including pre- and post-effective amendments to this registration statement, any subsequent registration statement for the same offering which may be filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, and pre- or post-effective amendments thereto, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming all that said attorney-in-fact or his substitute, each acting alone, may lawfully do or cause to be done by virtue thereof.
| /s/ Lisbeth R. Barron | |
| Lisbeth R. Barron |
