The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
BARCLAYS BK PLC CONV ZERO CPN Convertible Bonds 06741JV89 17 15,000 PRN   SOLE 0 15,000 0 0
LAYNE CHRISTENSEN 4.25 CONVERT DUE 11/15/2018 Convertible Bonds 521050AB0 13,369 14,721,000 PRN   SOLE 0 14,721,000 0 0
WALTER INVTS MGMT 4.5 CONVERT DUE NOV 1, 2019 Convertible Bonds 93317WAA0 1,400 2,000,000 PRN   SOLE 0 2,000,000 0 0
APPLE INC. Common Stocks 037833100 26,665 230,229 SH   SOLE 0 230,229 0 0
ABB LIMITED Common Stocks 000375204 10,046 476,811 SH   SOLE 0 476,811 0 0
ACCENTURE PLC Common Stocks G1151C101 7,311 62,417 SH   SOLE 0 62,417 0 0
AMGEN INC Common Stocks 031162100 219 1,500 SH   SOLE 0 1,500 0 0
AMAZON COM INC Common Stocks 023135106 232 310 SH   SOLE 0 310 0 0
APACHE CORP Common Stocks 037411105 1,264 19,908 SH   SOLE 0 19,908 0 0
CHECK POINT SOFTWARE TECH Common Stocks M22465104 11,822 139,975 SH   SOLE 0 139,975 0 0
CHEVRON CORP. Common Stocks 166764100 1,065 9,050 SH   SOLE 0 9,050 0 0
DISH NETWORK CORP Common Stocks 25470M109 708 12,225 SH   SOLE 0 12,225 0 0
DORCHESTER MINERALS LP Common Stocks 25820R105 1,724 98,230 SH   SOLE 0 98,230 0 0
DELL TECHNOLOGIES CLASS V Common Stocks 24703L103 12,560 228,494 SH   SOLE 0 228,494 0 0
ENTERPRISE PRODUCTS PRTNS Common Stocks 293792107 33,337 1,232,882 SH   SOLE 0 1,232,882 0 0
FITBIT, INC. Common Stocks 33812L102 900 122,929 SH   SOLE 0 122,929 0 0
TWENTY-FIRST CENTURY FOX, INC Common Stocks 90130A101 10,202 363,842 SH   SOLE 0 363,842 0 0
GILEAD SCIENCES, INC Common Stocks 375558103 12,935 180,626 SH   SOLE 0 180,626 0 0
ALPHABET INC CL C (GOOGLE C) Common Stocks 02079K107 25,593 33,159 SH   SOLE 0 33,159 0 0
ALPHABET INC CL A (GOOGLE A) Common Stocks 02079K305 16,839 21,249 SH   SOLE 0 21,249 0 0
HCP, INC. Common Stocks 40414L109 294 9,901 SH   SOLE 0 9,901 0 0
HONEYWELL INTL INC Common Stocks 438516106 1,566 13,521 SH   SOLE 0 13,521 0 0
INOVALON HOLDINGS INC. (Class A) Common Stocks 45781D101 9,815 952,958 SH   SOLE 0 952,958 0 0
KINDER MORGAN, INC. Common Stocks 49456B101 23,337 1,126,868 SH   SOLE 0 1,126,868 0 0
LAS VEGAS SANDS Common Stocks 517834107 11,124 208,278 SH   SOLE 0 208,278 0 0
MATTEL, INC. Common Stocks 577081102 12,823 465,455 SH   SOLE 0 465,455 0 0
MONSANTO COMPANY Common Stocks 61166W101 17,588 167,174 SH   SOLE 0 167,174 0 0
THE MOSAIC COMPANY Common Stocks 61945C103 6,644 226,514 SH   SOLE 0 226,514 0 0
MATADOR RESOURCES CO. Common Stocks 576485205 1,159 45,000 SH   SOLE 0 45,000 0 0
NOBLE ENERGY INC Common Stocks 655044105 13,080 343,667 SH   SOLE 0 343,667 0 0
QUALCOMM INC Common Stocks 747525103 35,871 550,164 SH   SOLE 0 550,164 0 0
SKECHERS U.S.A. INC. Common Stocks 830566105 1,923 78,223 SH   SOLE 0 78,223 0 0
SCHLUMBERGER LTD Common Stocks 806857108 16,108 191,879 SH   SOLE 0 191,879 0 0
SYNGENTA AG ADR Common Stocks 87160A100 1,186 15,000 SH   SOLE 0 15,000 0 0
TEVA PHARMACEUTICAL ADR Common Stocks 881624209 13,560 374,068 SH   SOLE 0 374,068 0 0
EXXON MOBIL CORP Common Stocks 30231G102 379 4,196 SH   SOLE 0 4,196 0 0
XYLEM INC. Common Stocks 98419M100 9,650 194,875 SH   SOLE 0 194,875 0 0
SINTANA ENERGY INC. NEW Common Stocks 82938H107 1 52,895 SH   SOLE 0 52,895 0 0