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			<nameOfIssuer>EnLink Midstream Partners LLC</nameOfIssuer>
			<titleOfClass>COM UNIT</titleOfClass>
			<cusip>29336T100</cusip>
			<value>48906</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1502964</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1502964</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EnLink Midstream Partners LLC</nameOfIssuer>
			<titleOfClass>COM UNIT</titleOfClass>
			<cusip>29336T100</cusip>
			<value>8428</value>
			<shrsOrPrnAmt>
				<sshPrnamt>259015</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>259015</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>EnLink Midstream  Partners LP</nameOfIssuer>
			<titleOfClass>COM UNIT</titleOfClass>
			<cusip>29336U107</cusip>
			<value>107</value>
			<shrsOrPrnAmt>
				<sshPrnamt>4316</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>4316</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Approach Resources,  Inc.</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>03834A103</cusip>
			<value>6067</value>
			<shrsOrPrnAmt>
				<sshPrnamt>920631</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>920631</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>Approach Resources,  Inc.</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>03834A103</cusip>
			<value>395</value>
			<shrsOrPrnAmt>
				<sshPrnamt>59985</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>59985</Shared>
				<None>0</None>
			</votingAuthority>
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		<infoTable>
			<nameOfIssuer>Bank of Montreal</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>063671101</cusip>
			<value>4721</value>
			<shrsOrPrnAmt>
				<sshPrnamt>78719</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>78719</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Google Inc. (Class A)</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>38259P508</cusip>
			<value>666</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1200</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Google Inc. (Class C)</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>38259P706</cusip>
			<value>658</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1200</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>1200</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Rockwell Automation  Inc.</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>773903109</cusip>
			<value>696</value>
			<shrsOrPrnAmt>
				<sshPrnamt>6000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>6000</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Hallador Energy   Company</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>40609P105</cusip>
			<value>32600</value>
			<shrsOrPrnAmt>
				<sshPrnamt>2788685</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>2788685</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Star Gas Partners L.P.</nameOfIssuer>
			<titleOfClass>UNIT</titleOfClass>
			<cusip>85512C105</cusip>
			<value>1480</value>
			<shrsOrPrnAmt>
				<sshPrnamt>200000</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>200000</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>TCP Capital Corp.</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>87238Q103</cusip>
			<value>1226</value>
			<shrsOrPrnAmt>
				<sshPrnamt>76546</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>76546</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Vanguard Index  Growth ETF (VUG)</nameOfIssuer>
			<titleOfClass>Growth ETF</titleOfClass>
			<cusip>922908736</cusip>
			<value>17457</value>
			<shrsOrPrnAmt>
				<sshPrnamt>166881</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>166881</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
		<infoTable>
			<nameOfIssuer>Vanguard Index Value  ETF (VTV)</nameOfIssuer>
			<titleOfClass>Value ETF</titleOfClass>
			<cusip>922908744</cusip>
			<value>17085</value>
			<shrsOrPrnAmt>
				<sshPrnamt>204126</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
			</shrsOrPrnAmt>
			<investmentDiscretion>SOLE</investmentDiscretion>
			<votingAuthority>
				<Sole>204126</Sole>
				<Shared>0</Shared>
				<None>0</None>
			</votingAuthority>
		</infoTable>
</informationTable>
